Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC Applied Geoscience and Technology Division (SOPAC)

September 2013

Salesh Kumar, Jens Kruger, Zulfikar Begg, Eileen Handerson, & Manoël Alvis

SPC SOPAC TECHNICAL REPORT (PR106)

Ocean and Islands Programme © Copyright Secretariat of the Pacific Community (SPC), 2013

All rights for commercial / for profile reproduction for translation, in any form, reserved. SPC authorises the partial reproduction or translation of this material for scientific, educational or research purposes, provided that SPC and the source document are properly acknowledged. Permission to reproduce the document and/or translate in whole, in any form, whether for commercial / for profit or non-profit purposes, must be requested in writing. Original SPC artwork may not be altered or separately published without permission.

SPC Applied Geoscience and Technology Division (SOPAC) Private Mail Bag GPO Suva Fiji Islands Telephone: (679) 338 1377 Fax: (679) 337 0040 E-mail: [email protected] Web site: http://www.sopac.org SPC Applied Geoscience and Technology Division (SOPAC)

Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC SOPAC TECHNICAL REPORT (PR106)

Salesh Kumar, Jens Kruger, Zulfikar Begg, Eileen Handerson, & Manoël Alvis

September 2013

Ocean and Islands Programme DISCLAIMER

While care has been taken in the collection, analysis, and compilation of the data, it is supplied on the condition that the Secretariat of Pacific Community Applied Geoscience and Technology Division (SOPAC) shall not be liable for any loss or injury whatsoever arising from the use of the data.

Important Notice

This document has been produced with the financial assistance of the European Union through the Supporting Disaster Risk Reduction in Pacific Overseas Countries and Territories, th9 European Development Fund – C Envelope.

The contents of this document are the sole responsibility of the Secretariat of the Pacific Community and can under no circumstances be regarded as reflecting the position of the European Union.

The SPC Applied Geoscience and Technology (SOPAC) Division undertook the work in collaboration with ‘Service de I’Urbanisme’ of French Polynesia TABLE OF CONTENTS

EXECUTIVE SUMMARY...... 2

1 INTRODUCTION...... 3

1.1 Background...... 3

1.2 Geography...... 3

2 reSULTS AND DISCUSSION...... 5

2.1 multibeam bathymetry...... 5

3 ACQUISITION AND PROCESSING...... 11

3.1 Fieldwork summary...... 11

3.2 Field personnel...... 11

3.3 Geodetic reference system...... 11

3.4 Vessel description and static offsets...... 12

3.5 Positioning control...... 13

3.6 Survey computer...... 13

3.7 multibeam echosounder...... 13

3.8 multibeam echosounder data processing...... 14

3.9 Tidal information...... 15

3.10 Sound velocity profiling...... 15

4 APPENDICES...... 19

APPENDIX A: CONDUCTIVITY, TEMPERATURE AND DEPTH PROFILES...... 19

APPENDIX B: MULTIBEAM LOG SHEETS...... 39

APPENDIX C: rangiroa, french Polynesia bathymetry chart

1 Multibeam Bathymetry Survey Rangiroa, French Polynesia EXECUTIVE SUMMARY

This report describes a multibeam bathymetric survey of Rangiroa Lagoon and nearshore areas around the atoll rim, from the northwest (near Tivaru) to the northeast (near Ataiaheo motu). The survey was a component of the Supporting Disaster Risk Reduction in Pacific Overseas Countries and Territories project, conducted by the Secretariat of the Pacific Community Applied Geoscience Division, in collaboration with the Urban planning Department, and the Lighthouses and Beacons Service. This project component called for an investigation of the nearshore and lagoon seabed of Rangiroa Atoll. The survey was carried out using a multibeam echosounder over a period of six months (July to December 2011).

Figure 1. Location of Rangiroa Atoll, French Polynesia.

2 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia 1 INTRODUCTION

1.1 Background French Polynesia experiences a variety of major natural hazards, some of which are potentially very damaging to human life, the economy and infrastructure. In response, the country has introduced a risk-prevention policy that regulates development activities, and thereby increases protection for people and property against natural disaster hazards. The partnership programme between the Secretariat of the Pacific Community (SPC) and French Polynesia aims to assess the storm surge hazard in the Tuamotu Archipelago at the atoll scale, so that this hazard can be accurately addressed in future land-use plans.

This programme was jointly implemented by the Service de l’Urbanisme of French Polynesia and the Applied Geoscience Division (SOPAC) of SPC. Under this programme SOPAC carried out a multibeam echosounder (MBES) bathymetry survey of Rangiroa Lagoon and the outer reef slope to a depth of around 300 meters (m).

The objective was to investigate the seabed and provide information about water depths in the lagoon and nearshore areas of Rangiroa Atoll to assist French Polynesia in deriving coastal-related information to underpin and inform storm surge hazard mitigation in the Tuamotu Islands.

Figure 2. Chart of Rangiroa Atoll, showing the location of the offshore survey areas (excerpt from the Service Hydrographique et Oceanographique de la Marine; publication 1997, edition no. 2, 2002 chart 7373 of Archipel de Tuamotu, Rangiroa).

1.2 Geography Rangiroa is the largest atoll in the Tuamotus, and one of the largest atolls in the world. It is located about 335 kilometres (km) northeast of Tahiti; the nearest atoll is Tikihau, located 12 km to the west. The main town on Rangiroa is Avatoru, in the northwestern part of the atoll (Figure 3). The atoll consists of about 415 motus, islets and sandbars, with a total land area of about 170 km2. There are approximately one hundred narrow passages in the fringing reef (called hoa). The atoll has a flattened elliptical shape, and is 80 km long and 5–32 km wide. The width of the land is 300–500 m, with a circumference of about 200 km. The lagoon has a maximum depth of 38 m, and a surface area of 1446 km2.

Only two islands, located on the northern end of the atoll, are permanently inhabited. In 2007, the island had a population of 2,473. The main villages are Avatoru, Tiputa, Ohutu, Taeo’o, Fenuaroa, Otepipi and Tivaru. Avatoru and Tiputa are on neighbouring islands, separated by Tiputa pass, one of the atoll’s two major passes (the other is Avatoru pass, immediately to the west of the island of Avatoru).

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 3 Multibeam Bathymetry Survey Rangiroa, French Polynesia

Figure 3. Avatoru, in the northwestern part of Rangiroa Atoll. The islet of Avatoru is bounded by Avatoru pass to the west and Tiputa pass to the east.

Table 1: Summary of the geography of Rangiroa Atoll.

Summary of the geography of Rangiroa Atoll Location Pacific Ocean: 15.12° S 147.64° W Land Area The shape of the atoll is a flattened ellipse, extending 80 km from east to west and 32 km from north to south, with an approximate land area of 79 km2. Coastline The lagoon is enclosed by an almost continuous reef flat, with approximately 100 narrow passages in the fringing reefs. The main villages are Avatoru and Tiputa. Avatoru and Tiputa are built on neighbouring islands that are 2.5 km and 4 km in length, respectively, and separated by Tiputa pass, one of the atoll’s two major passes (the other is Avatoru pass, immediately to the west of the island of Avatoru). The lagoon has a surface area of about 1,446 km2 and a maximum depth of 38 m. Tides Tides are semi-diurnal with pronounced diurnal inequalities (i.e. two tidal cycles per day of unequal tidal range). Predicted mean range at Rangiroa Atoll is 0.52 m, with a mean spring range of 0.64 m. (Source: tidesandcurrents. noaa.gov/tides10/tab2wc3.html). Climate Rangiroa has a humid tropical climate, with two relatively distinct seasons (a wet season from December to March, and a dry season from July to October). Rainfall is lower than would be recorded on a high island in the same location due to the lack of relief. The atoll is influenced by the easterly trade winds. The mean temperature ranges around 25°C, with a daily temperature range of approximately 4°C. The mean temperature is 27°C.

4 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia 2 reSULTS AND DISCUSSION

2.1 Multibeam bathymetry In total, 2,118 km of survey lines were run over the 141 days that the vessel was mobilised. A breakdown of data acquisition versus down time is summarised in Figure 5 below, showing that 39% of the time was spent on the acquisition of bathymetric data. The coverage achieved during that time is shown in Figure 5. Further details on line runs can be found in the log sheets attached as Appendix B.

Official leave for FP survey staff (26%)

26% Weather downtime (7%) 39%

Mechanical downtime (13%) 7% Electrical downtime (15%) 13% 15% Survey days sucessful data acquisition (39%)

Figure 4: Summary of vessel activity during mobilisation period. The survey vessel Toa Nui was mobilised for a total of 141 days. Data was acquired during 54 survey days (39% of the time). The remainder of the time was spent as official leave for French Polynesia survey staff (26%); weather downtime (7%); mechanical downtime (13%); and electrical downtime (15%).

Figure 5: Survey coverage map. Survey lines run inside the lagoon are shown in red, and lines run on the oceanside to the north are shown in blue.

The MBES bathymetry acquired during this study is shown on a chart at a scale of 1:100,000, with contour intervals of 5 m in the lagoon, and 50 m on the nearshore slope. The original chart is drawn to fit an A0 paper size, with a reduced version shown in Figure 6.

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 5 Multibeam Bathymetry Survey Rangiroa, French Polynesia

Figure 6: Final bathymetric chart of Rangiroa Atoll (scale 1:100,000 printed at A0).

The nearshore survey area on the ocean side of the reef slope extended from the coast to a water depth of approximately 300 m. Minimum water depths were measured near the coast on the outer slope of the fringing reef, with depths increasing in a general seaward direction at a mean slope angle of 31º toward the offshore limits of the survey area. As expected, the seabed is quite irregular locally, with highly variable slope angles ranging from 0º to 83º.

Bathymetric data provide information on the depth and morphology of the seafloor, as well as the shape and size of submarine features. Bathymetric derivatives (shaded relief maps, and three-dimensional rendered surfaces) can be used in addition to the high resolution bathymetry to aid visual interpretation of the seabed morphology (Figure 7 to Figure 10).

Table 2. Bathymetric derivatives.

Bathymetric derivatives Shaded relief Shaded relief maps use shades of grey to indicate the local orientation of the seafloor relative to a user-defined light source direction. The light source can be thought of as the sun shining on a topographic surface, much like artificial hill shading that illuminates bathymetric roughness. Portions of the surface that face away from the light source reflect less light toward the viewer, and thus appear darker. Three-dimensional For three-dimensional surfaces, the height of the surface corresponds to the depth of the seafloor. surface

6 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

Figure 7: Shaded relief map of Tiputa channel. Sun illumination angle from the northwest.

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 7 Multibeam Bathymetry Survey Rangiroa, French Polynesia

Figure 8: Three-dimensional perspective image of Tiputa channel, looking toward the southeast. Depths shallow (red) to deep (blue), 4x vertical exaggeration.

8 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

Figure 9: Shaded relief map of Tiputa channel. Sun illumination angle from the northwest.

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 9 Multibeam Bathymetry Survey Rangiroa, French Polynesia Figure 10: Three-dimensional perspective image of Avatoru channel, looking toward the southeast. Depths shallow (red) to deep (blue), 4x vertical exaggeration. the southeast. Depths shallow (red) channel, looking toward perspective image of Avatoru 10: Three-dimensional Figure 10 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia 3 ACQUISITION AND PROCESSING

3.1 Fieldwork summary

Table 3: Survey particulars.

Survey particulars Survey vessel Toa Nui Fieldwork period 01/08/2011 to 13/12/2011 Equipment used R2Sonic 2024 multibeam

All dates and times in this report are given in local Tahiti time (Coordinated Universal Time –10).

3.2 Field personnel

Table 4: Personnel

SOPAC Jens Kruger Physical Oceanographer Salesh Kumar Senior Technical Assistant Zulfikar Begg Senior Technical Assistant Peni Musunamasi Electronics Engineer Avitesh Ram Electronics Techinician Maleli Turangabeci Electronics Techinician French Polynesia Eileen Handerson Hydrographic Surveyor Manoël Alvis Captain

3.3 Geodetic reference system Survey results were mapped in terms of the following geodetic reference system.

Table 5: Geodetic reference system

Geodetic reference system Geodetic datum Universal Transverse Mercator Zone 6 South Ellipsoid WGS 84 semi-major axis 6378137.000 flattening (1/f) 298.257223563 eccentricity sq. (e2 ) Projection UTM Zone 6 South projection type Transverse Mercator Central meridian 147 00 00.000W Reference latitude 00 00 00.000N False easting 500000.000 False northing 1000000.000

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 11 Multibeam Bathymetry Survey Rangiroa, French Polynesia

Geodetic reference system Scale factor 0.9996000000 grid unit metres Geodetic transformation from WGS 84 (GPS satellite datum) to UTM 6 South source coordinate system WGS 84 target coordinate system UTM 6 South transformation parameters dX 0.00 dY 0.00 dZ 0.00 rX 0.00000 rY 0.00000 rZ 0.00000 scale 0.00000

3.4 Vessel description and static offsets

3.4 Vessel description and static oTableffsets 6: Vessel description and static offsets

Vessel description and static offsets 3.4 Vessel description and static offsets Table 6: Vessel description and static offsets Not to scale

Sensor X (m) Y (m) Z (m) Table 6: Vessel description and static offsets Not to scale Sensor X (m) Y (m) Z (m) Not to scale Reference point at water level 0.00 0.00 0.00 Sensor X (m) Y (m) Z (m) MBES -Y +Y Reference point at water level 0.00 0.00 0.00 -Y +Y MotionReference reference point at unitwater (MRU) level 0.00 0.00 0.00 0.00 0.00 -0.115 MBES Motion reference unit (MRU) PositioningMotion 0.00 reference antenna 0.00 unit (GPS1)(MRU) -0.115 0.00 0.00 0.00 3.188 -0.1152.610 GPS2 GPS2MRU MRU GPS1GPS1 -X-X Positioning antenna (GPS1) MultibeamPositioning 0.00 aechosounderntenna 3.188 (GPS 1 (MBES)) 2.610 0.00 -1.875 3.188 -1.728 2.6100.685 +X+X Multibeam echosounder (MBES) -1.875 -1.728 0.685 Multibeam echosounder (MBES) -1.875 -1.728 0.685 Vessel

Vessel Name Toa Nui Name Toa Nui Name Toa LengtNui h overall 9.90 m LengthBeam (mid) overall 3.10 m 9.90 m Length overall 9.90 m BeamDraft (mid) (mid) 0.75 m 3.10 m -Y +Y Beam (mid) 3.10DraftDisplacement m (mid) 3.95 T 0.75 m GPS2 GPS1 Draft (mid) 0.75DisplacementPort m of registry Tahiti 3.95 T -Z Water level -Y +Y Radio call sign FGD7522 MRU Displacement 3.95Port T of registry Tahiti GPS2 GPS1 +Z RadioClassification call sign Motor yFGD7522acht MBES Port of registry Tahiti -Z Classification Motor yachtWater level Radio call sign FGD7522 MRU +Z Classification Motor yacht MBES

12 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

Figure 11: The survey vessel Toa Nui.

3.5 Positioning control and heading The vessel’s origin is the reference by which all devices and tracking points are positioned on the vessel. Each sensor is referenced to the origin based on the distance in survey units. It is starboard (X-direction), forward (Y-direction) and vertical (Z-direction). Vessel offsets are measured from the static water line, and are positive downward (Table 6).

Positioning was by the MarineSTAR 9200 G2H DGNSS dual frequency positioning equipment. The addition of the G2 service provided an accuracy of 0.2 m. The patch test was conducted in Tahiti and again in Rangiroa at the start and end of the survey. The MarineSTAR also provided heading information by use of a second antenna (see GPS2 in diagram of Table 6).

3.6 Survey computer The survey computer was a Windows XP PC, running Hypack 11.0.1.49. This computer was used for continuous online data logging and computation of positioning and digital bathymetry. The package also provided a line control display for the helm. The online operator continuously monitored a range of quality control parameters.

An off-line Hypack 11.0.1.49 package was used in the office for replaying and post-processing of track data and bathymetry. An A0 plotter was available for the production of charts.

3.7 Multibeam echosounder A R2Sonic 2024 wideband multibeam echosounder system was temporarily installed on Toa Nui, and used to provide swath bathymetry data. An MBES provided high resolution information about the depth of water from the surface to the seafloor in a water body. The main instrumental and operating parameters are listed below.

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 13 Multibeam Bathymetry Survey Rangiroa, French Polynesia

Table 7: Multibeam echosounder parameters.

Multibeam echosounder parameters Instrumentation Multibeam echosounder R2Sonic 2024 Transducer mount Port side-mounted Motion reference unit TSS DMS 2-05 Dynamic Motion Sensor Sound velocity probe at transducer Valeport Mini SV R2Sonic 2024 System Specification Frequency 400 kHz/200 kHz Beamwidth - across track 0.5° @ 400 kHz / 1.0° @ 200 kHz Beamwidth - along track 1.0° @ 400 kHz / 2.0° @ 200 kHz Number of beams 256 Swath sector 10° to 160° (user selectable) Maximum slant range 500 meters Pulse length 15 µsec - 1000 µsec Pulse type Shaped Continuous Wave (CW) Depth rating 100 meters Operating temperature 0° C to 40° C Dynamic offset calibration Rangiroa 01 August 2011 Roll correction -2.09 Pitch correction 0.25 Yaw correction -2.0 GPS latency correction 0.0

3.8 Multibeam echosounder data processing Hypack 11.0.1.49 software was used for post-processing the MBES survey data. The production of contour maps was done using Surfer 10.7.972 software. The processing and gridding sequences are listed below.

Table 8: Data processing.

Data processing Post-processing sequence Phase 1 Tide (water level) and sound velocity corrections. Phase 2 Search and filter options are used for editing the data. Removed poor-quality beams (quality <3) and outliers from individual survey lines. Phase 3 Applied 4th standard deviation filter to remove outliers from median depth. Further manual cleaning of outliers. Output ASCII XYZ file using actual positions of median sounding depths in the project coordinate system. Map Production Sequence Input XYZ output data from Hypack reduced to 1 mm at charting scale (e.g. 50 m-grid size for a chart at 1:50 000). Surface model XYZ output data were gridded using the Kriging method in Surfer 10.7.972. Data gaps were interpolated using three times the survey line spacing. Output DXF contours, PDF chart, backdrop images, and DTM model in the project coordinate system. See Appendix C

Various levels of smoothing were applied to the contours and digital terrain model (DTM) to give a more realistic impression of the seabed without removing any real features from the dataset. However, due to the fact that the majority of survey lines were oriented from north to south, some striping can be observed on the final gridded and interpolated dataset. 14 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

3.9 Tidal information Observed soundings were reduced to the chart datum using the observed tidal elevations from the Rangiroa tide gauge. The table below details the station metadata.

Table 9: Tidal station metadata.

Tidal station metadata Code rangi Country France Location Rangiroa Atoll (Tuamotu, French Polynesia) Status Operational Local contact University of French Polynesia (France) Other contact Service Hydrographique et Océanographique de la Marine (France) Latitude -14.945834667° Longitude -147.706037917° Connection GTS message GTS message type SEHI40 Sensor 1 Type of sensor Pressure Sampling rate (min) 2 Sensor 2 Type of sensor Radar Sampling rate (min) 2

The tide data were obtained from the Intergovernmental Oceanographic Commission website (www.ioc- sealevelmonitoring.org). Data on this website are not reduced to chart datum and a correction of -5.945 m was, therefore, applied to the pressure sensor values (Marie Protat, Service Hydrographique et Océanographique de la Marine, pers. comm.).

3.10 Sound velocity profiling The accuracy of the depth soundings depends in part on the variation of the speed of sound with water depth. Sound velocity profiles are, therefore, required in order to find the correct depth and location of water depth soundings. The speed of sound in seawater varies with temperature, salinity and depth, and was determined by measuring the conductivity, temperature and depth (CTD) through the water column. The main instrumental, operational, and processing parameters are listed below.

Table 10: Sound velocity profiling.

Sound velocity profiling CTD instrumentation Make SeaBird Electronics Model SeaCat 19 (self-powered, self-contained) Serial number 2795 Depth rating 3,000 m Operating parameters Sample rate 1 scan every 0.5 s Maximum depth Limited to 200 m due to rope length Data recorded Profiles of conductivity, temperature, and pressure

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 15 Multibeam Bathymetry Survey Rangiroa, French Polynesia

Sound velocity profiling Data processing Positioning The profile position was taken at the GPS attenna near the start of the downcast. No allowance was made for instrument or vessel drift over the duration of the profile, which may be significant (>50 m). Data conversion Convert raw data (.hex) to a .cnv file. The following values are output from the recorded data: • Pressure, dbar • Depth, m (derived using salt water at local latitude) • Temperature, °C (ITS-90) • Salinity, psu (derived) • Density, kg m-3 (derived) • Sound velocity, m s-1 (derived using Chen and Millero 1977) Bin average Average data into 1 m depth bins. No filtering was applied. Output Processed data is saved in ASCII text format with the date_bin.cnv.

The CTD profile details are listed below, with locations plotted in Figure 12. Summaries of the CTD profile data in graphical form are shown in Appendix A.

Table 11: CTD profile details.

CTD profile details CTD casts Date Time Easting Northing Depth (m) CTD cast 1 03/08/2011 12:43 426531.13 8340621.39 33 CTD cast 2 04/08/2011 09:55 425275.8 8331685.1 36 CTD cast 3 05/08/2011 10:21 420512.09 8330968.56 28 CTD cast 4 07/08/2011 09:22 432057.4 8329436.6 30 CTD cast 5 09/08/2011 14:11 431340.36 8344030.48 24 CTD cast 6 10/08/2011 10:32 409312.33 8345559.75 21 CTD cast 7 11/08/2011 12:36 420998.66 8343142.51 26.5 CTD cast 8 12/08/2011 11:29 427526.12 8316849.16 30 CTD cast 9 14/08/2011 11:11 432533.56 8324540.37 29 CTD cast 10 15/08/2011 13:02 434920.94 8330379.36 28 CTD cast 11 16/08/2011 13:20 437263.4 8327419.46 30 CTD cast 12 17/08/2011 12:19 437217.61 8331051.16 28 CTD cast 13 18/08/2011 11:40 424091.38 8323799.33 32 CTD cast 14 21/08/2011 12:57 428359.4 8337199.26 35 CTD cast 15 23/08/2011 11:36 421610.51 8326826.94 28 CTD cast 16 24/08/2011 14:18 418133.35 8329982.81 26 CTD cast 17 29/08/2011 11:14 422875.24 8331083.36 34 CTD cast 18 30/08/2011 12:15 415776.73 8339525.67 30 CTD cast 19 31/08/2011 12:56 424817.61 8317423.33 23 CTD cast 20 02/09/2011 12:26 413363.27 8340145.3 28 CTD cast 21 06/09/2011 15:08 408572.34 8331638.08 18 CTD cast 22 07/09/2011 13:46 404925.64 8330558.14 18 CTD cast 23 12/09/2011 14:52 413311.2 8326739.73 29 CTD cast 24 13/09/2011 15:08 403635.08 8338633.92 20 CTD cast 25 14/09/2011 14:15 424126.64 8323178.7 33 CTD cast 26 15/09/2011 15:00 405023.4 8332326.78 19 CTD cast 27 16/09/2011 14:12 428969.21 8329763.81 30 CTD cast 28 27/09/2011 12:23 440949.31 8316954.74 26

16 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

CTD profile details CTD casts Date Time Easting Northing Depth (m) CTD cast 29 28/09/2011 13:18 443324.1 8320040.9 28 CTD cast 30 29/09/2011 14:10 444518.64 8324167.72 26 CTD cast 31 30/09/2011 12:30 430061.84 8320207.8 24 CTD cast 32 02/10/2011 13:45 466090.56 8312398.3 18 CTD cast 33 03/10/2011 14:08 464903.84 8310158.54 20 CTD cast 34 04/10/2011 12:32 463123.96 8310708.03 21 CTD cast 35 05/10/2011 13:02 446952.08 8319763.98 30 CTD cast 36 06/10/2011 13:30 449327.49 8318668.29 21 CTD cast 37 21/10/2011 12:12 451430.21 8310854.65 22 CTD cast 38 24/10/2011 10:50 462446.17 8314483.54 20 CTD cast 39 25/10/2011 13:26 460758.87 8313003.51 20 CTD cast 40 26/10/2011 13:02 459519.88 8312249.52 25 CTD cast 41 17/11/2011 10:30 421152.22 8332210.94 29 CTD cast 42 21/11/2011 13:53 457106.55 8312252.72 25 CTD cast 43 02/12/2011 13:28 430742.37 8342447.75 28 CTD cast 44 04/12/2011 13:20 432240.72 8343765.42 21 CTD cast 45 05/12/2011 13:55 453208.77 8317452.41 27 CTD cast 46 06/12/2011 13:28 406060.54 8344844.12 97 CTD cast 47 07/12/2011 13:20 406463.13 8336766.05 25 CTD cast 48 08/12/2011 12:30 462331.51 8319638.97 196 CTD cast 49 09/12/2011 13:35 426616.45 8347802.18 113 CTD cast 50 09/12/2011 13:20 431428.95 8344416.16 24 CTD cast 51 11/12/2011 13:28 427385.84 8346591.48 18 CTD cast 52 12/12/2011 10:53 427394.9 8346604.19 18

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 17 Multibeam Bathymetry Survey Rangiroa, French Polynesia angiroa Atoll. Locations of CTD casts are shown by yellow circles and the cast number is indicated by the red number. The number. and the cast number is indicated by red shown by yellow circles Atoll. Locations of CTD casts are for R angiroa and depth (CTD) profiles temperature 12: Location of conductivity, Figure is a 2002 IKO N OS satellite image. backdrop

18 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia 4 APPENDIces

Appendix A: Conductivity, Temperature and Depth (CTD) profiles

This appendix shows plots of the CTD profiles. Both downcast and upcast are shown. The title of each plot indicates the date on which the cast was done year, month, and date format (yyyymmdd). Please refer to Table 11 and Figure 12 for numbering and locations.

The plots consist of three x-axis and one y-axis. The y-axis shows depth in metres. The different x-axis show sound velocity, temperature and density as follows: the first x-axis at the top of the plot shows sound velocity in m/s (blue labels and line); the second x-axis under the plot shows temperature in degrees Celcius (red labels and line); and the third x-axis at the bottom of the plot shows Density in kg/m3 (green labels and line).

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 19 Multibeam Bathymetry Survey Rangiroa, French Polynesia

20 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 21 Multibeam Bathymetry Survey Rangiroa, French Polynesia

22 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 23 Multibeam Bathymetry Survey Rangiroa, French Polynesia

24 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 25 Multibeam Bathymetry Survey Rangiroa, French Polynesia

26 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 27 Multibeam Bathymetry Survey Rangiroa, French Polynesia

28 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 29 Multibeam Bathymetry Survey Rangiroa, French Polynesia

30 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 31 Multibeam Bathymetry Survey Rangiroa, French Polynesia

32 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 33 Multibeam Bathymetry Survey Rangiroa, French Polynesia

34 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 35 Multibeam Bathymetry Survey Rangiroa, French Polynesia

36 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 37 Multibeam Bathymetry Survey Rangiroa, French Polynesia

38 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia Comments / Online changes

Patch Test Lines Patch Test

Line QC

(.LOG) Log File

(.HSX) 021_1516 020_1512 019_1509 018_1505 017_1502 016_1457 009_1454 008_1450 007_1446 007_1442 008_1439 009_1434 016_1431 017_1426 018_1423 019_1418 020_1412 Filename 5 3 4 3 4

3.7 4.3 5.1 4.2 3.1 4.8 3.5 3.9 3.8 4.7 3.1 3.6 SPD

130 145 332 126 311 123 320 132 315 118 336 131 321 127 324 136 315 HDG Hypack Project Name: PF_Rangiroa Hypack Project Polynesia Country: French Rangiroa Area: Nui Toa Vessel: MBES System: R2SONIC 2024 Positioning: MarineStar

E OL Fix

SOL SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

E OL

Time SOL 14:12 9 8 7 7 8 9

21 20 19 18 17 16 16 17 18 19 20 N o. Line Static Offsets Dynamic Offsets Location

RANGIROA LAGOON

Date 1/08/2011

GPS: X = 0.0; Y 3.188; Z 2.610 MRU: X = 0.00; Y Z =- 0.115 MBES Head: X = -1.875; Y -1.728.4; Z 0.685 = -2.0; Pitch 0.25; Roll -2.09; Latency 0.00 Yaw

Appendix B: Multibeam log sheets SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 39 Multibeam Bathymetry Survey Rangiroa, French Polynesia

Start of survey, heading towards line 168 heading towards Start of survey,

End line E 314, continue shore parallel to wharf End line E 314, continue shore

Stop line (Hypack problem)

Line To Tiputa Wharf Line To

168_0749 168_0649 164_1153 164_1118 164_1036 160_0950 160_0850 005_1010 008_1000 009_0957 004_0948 001_0924 006_0939 002_0936 003_0934 004_0931 005_0929 005_0925 004_0922 003_0920 002_0916 006_0914 001_0910 018_1522 168 _0849 160_00750 3 3 5

5 5

7 5.4 5.8 6.5 4.8 3.5 7.3 4.7 3.1 4.6 4.4 4.6 3.7 4.6 4.4 4.6 3.9 4.2 3.7 2.94 2.85

16 31 179 184 269 357 216 151 180 189 113 223 137 305 141 320 134 311 134 307 146 326 133 320 132 134

70 467 414 357 315 250 152 126

71 415 358 316 251 217 127 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:46 8:49 7:49 9;50 8:50 12:45 11:53 11:18 10;35

8:49 7:49 6:49 9:50 8:50 7:50 11:53 11:18 10:36

5 8 9 4 1 6 2 3 4 5 5 4 3 2 6 1

18 168 168 168 164 164 164 160 160 160

Rangiroa Lagoon Rangiroa

rangiroa laggon rangiroa

4/08/2011 3/08/2011 2/08/2011

40 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

E1193 error, E1206 error, Heading to Line 156 E1206 error, E1193 error, E1149 problem in Hypack navigation E1149 problem E1146, E1147 problem in Hypack navigation E1146, E1147 problem Heading to start of line 152, E1075 starting

Heading to line 14, end of going wharf Heading to line 13 west–east Line 12 west–east, end of line survey Heading to line 12 west–east. End of line 188

Heading towards line 188 Heading towards End of line 184

Heading towards line 184 Heading towards

Going across shore, and then end of line. shore, Going across End of line

Hypack error

ZB ZB ZB ZB

14_1358 13_1355 12_1258 156_0934 152_0909 152_0809 152_0709 184_1250 188_1228 188_1128 188_1028 184_0951 184_0851 184_0751 184_0651 176_1201 172_1157 172_1057 172_0957

4.8 5.6 4.8 4.3 2.8 3.4 3.2 4.5 4.4 3.9 3.7 3.5 4.5 2.7 5.2 4.5 4.8 3.18

49 21 16 28 6.1 336 189 160 113 178 146 184 291 166 165 171 307 626 280

980 970 945 864 797 764 699 643 634 625 619 534 1237 1223 1136 1066 1032 13.54

982 973 946 865 798 765 700 643 635 626 620 534 468 1239 1224 1137 1067 1031 1031 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:18 9:09 8:09 9:51 8:51 7:51 0:00 14:24 13:57 13:58 13:26 12:44 12:28 11:28 10:20 12:27 11:57 10:57

9:34 9:09 8:09 7:09 9:51 8:51 7:51 6:51 0:14 9:57 13:58 13:55 12:58 12:50 12:28 11:28 10:28 11:57 10:57

14 13 12 156 152 152 152 184 188 188 188 184 184 184 184 176 172 172 172

Rangiroa Lagoon Rangiroa

7/08/2011 5/08/2011

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 41 Multibeam Bathymetry Survey Rangiroa, French Polynesia Stop line for CTD Start line 26 Heading to line 26 End line

Start line 30 Heading towards line 30 west Heading towards

E2373 hysweep interface error, end of line E2373 hysweep interface error,

Heading to start line 22 E2188-gyro error, end of line 18 error, E2188-gyro NMEA gyro bad data error NMEA gyro Start line 18, going west

Network receive error R2sonic, end of line 148 error Network receive

r2 sonic time sync error Heading to line 148

1.5 to 2 m waves Heading to line 156

End of survey EW heading to line 16 start End of line NS line

Start line 70

ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB sk sk ZB ZB ZB ZB sk ZB sk SK SK SK SK SK SK

26_1105 26_1105 26_1054 30_1045 30_0945 30_0845 30_0821 22_1351 22_1251 22_1151 22_1051 18_1037 18_0944 18_0844 16_1356 16_1548 70_1048 70_0948 148_1404 148_1304 148_1223 148_1204 156_1138 156_1038 156_0938 192_1156 192_1056 5 4 2 5

4 5 4 5

5 5 5

3 6 5 6 7 5.4 5.4 4.8 4.2 3.2 4.9 4.3 4.1 4.9 4.3 4.9

5 9

4 91 54 21 87 90 14 63 84 19 275 280 319 163 109 243 281 272 277 171 161 170 273 264 79.9

2827 2777 2682 2669 2661 2549 2441 2439 2363 2297 2241 2200 2184 2107 1981 1971 1884 1834 1830 1798 1726 1659 1628 1548 1454 1363 1356

2778 2683 2671 2662 2550 2442 2440 2364 2297 2242 2201 2186 2108 2000 1972 1885 1834 1831 1799 1727 1660 1629 1548 1455 1365 1357 1241 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:45 8:44 9:44 12:34 12:05 11:05 10:52 10:45 14:36 13:51 12:51 11:51 10:46 10:24 14:16 14:04 13:00 12:23 12:03 11:38 10:38 14:27 13:56 12:53 11:56 10;53 10:48

9:45 8:45 8:21 9:44 8:44 9:38 9:48 12:05 11:05 10:54 10:45 13:51 12:51 11:51 10:51 10:37 14:04 13:04 12:23 12:04 11:38 10:38 13:56 12:56 11:56 10:56 10:48

26 26 26 30 30 30 30 22 22 22 22 18 18 18 16 16 70 70 148 148 148 148 156 156 156 192 192

9/08/2011 11/08/2011 10/08/2011

42 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

Testing Hypack,,,DNP Testing DNP Error Hypack navigation Error Error Hypack navigation Error

Heading to start line 136

1m waves, SE winds Start line 132, heading south

Tiputa Pass

Heading to line 144, E3718 144 starts End of line, Utoto

Start line 140 Heading to line 140

Line end Starting line 162

Heading to line 164 R2sonic netwrok receive error, end of line 160 error, receive R2sonic netwrok Start line 160 middle of lagoon, going south, calm sea, R2sonic error

End line

ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB SK ZB sk ZB ZB sk sk

6_1335 26_1341 26_1241 136_1345 136_1335 136_1326 136_1229 136_1129 136_1120 132_1039 132_0939 132_0839 144_1247 144_1147 144_1015 140_0948 140_0848 140_0748 140_0722 162_1311 162_1211 164_1138 164_1032 160_0910 160_0819

5 5 5 4 4 5 6

2 3 8

6 6 2 5

2 4.8 4.6 3.6 5.2 6.5 603 5.18 6.21

9 6

19 27 18 96 93 75 8.7 283 179 179 174 347 345 311 180 185 157 116 354 235 177

4461 4443 4441 4429 4381 4282 4281 4218 4133 4018 4000 3912 3803 3715 3673 3560 3441 3435 3395 3280 3222 3125 3035 2957 2914

4443 4442 4432 4382 4285 4282 4219 4134 4020 4002 3913 3805 3716 3674 3561 3443 3436 3396 3281 3223 3126 3036 2959 2915 2828 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:39 9:48 8:48 7:27 9:59 9:01 13:52 13:35 13:34 12:59 12:29 11:29 11:20 10:39 13:55 13:32 12:47 11:11 10:11 13:31 13:11 12:07 11:28 14:01 13:41

9:39 8:39 9:48 8:48 7:48 7:22 9:10 8:19 13:45 13:35 13:26 12:29 11:29 11:20 10:39 13:35 12:47 11:47 10:15 13:11 12:11 11:38 10:32 13:41 12:41

26 26 136 136 136 136 136 136 132 132 132 144 144 144 140 140 140 140 162 162 164 164 160 160

15/08/2011 14/08/2011 12/08/2011

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 43 Multibeam Bathymetry Survey Rangiroa, French Polynesia

DNP Hypack navigation error DNP error

Eastly winds , 1m waves

Hypack veritime sync error End line Error Rough seas with rain, R2sonic network error Start line 136 heading south

Heading to line 128, E4711 start

Start line 124 heading south, rough seas Start line 124 heading south, rough

ZB ZB ZB ZB ZB ZB sk ZB sk ZB sk sk sk sk sk sk sk sk

172_1255 172_1241 172_1148 172_1042 168_0948 168_0848 128_1225 128_1158 136_1108 136_1057 136_1014 136_0914 128_1328 128_1247 128_1147 124_1102 124_1002 124_0902

5 5

5 5 5 5

6 5 4 4 4 4

5 4 6 4 4 3

28 15 24 354 171 178 102 216 169 121 124 321 178 180 173

5488 5393 5308 5243 5144 5048 5020 4980 4928 4844 4828 4782 4700 4644 4556

5467 5460 5394 5310 5144 5147 5050 5022 4983 4981 4929 4845 4829 4783 4701 4645 4557 4462 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:48 13:09 12:26 11:39 10:31 13:19 12:13 11:37 10:56 10:14 13:33 13:16 12:47 11:44 11:02 10:02

9:48 8:48 9:14 9:02 12:55 12:41 12:34 11:48 10:42 12:25 11:58 11:08 10:57 10:14 13:28 12:47 11:47 11:02 10:02

172 172 172 172 172 168 168 128 128 136 136 136 136 128 128 128 124 124 124

18/08/2011 17/08/2011 16/08/2011

44 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia Heading to line 200 End of line Start line 204 going south

End of line

Stopped for CTD Error-R2sonic network Error-R2sonic Heading to line 180, error

Start line, rough seas Start line, rough

End line Heading to line 158 End line Very rough seas rough Very returned to wharf check everything Error new nw matrix created with the NW matrix, therefore Error ZB

ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB

180:1008 200_1004 204_0954 204_0854 180_1238 180_1138 180_1036 180_1034 176_0912 176_0812 158_1305 158_1216 166_1103 166_1003 5 5 7

6 4 3 6 3 4 5

5 3 3 3

14 86 101 181 358 338 253 175 175 150 230 1713

6467 6454 6438 6317 6209 6104 6006 5984 5900 5810 5716 5654 5574

6455 6438 6318 6210 6105 6010 6007 5985 5901 5812 5717 5657 5575 5491 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:54 9:12 10:20 10:03 13:31 12:38 11:29 10:33 10:06 13:59 12:57 12:00 11:03

9:54 8:54 9:12 8:12 10:04 12:38 11:38 10:36 10:34 10:08 13:05 12:16 11:03 10:03

200 204 204 180 180 180 180 180 176 176 158 158 166 166

24/08/2011 23/08/2011 21/08/2011

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 45 Multibeam Bathymetry Survey Rangiroa, French Polynesia

End of line ERROR, bad data from Gyro ERROR, bad data from

Start line

End of line Start line 200 End of line Start line 204

End of line

End of line-error survey acquisition End of line-error Start line

End of survey Hypack crashed closed Heading to line 216, E7007 start End of line Start line-very rough seas Start line-very rough

End of line

Heading to line 192,E6747 start line, stopped for fueling- 100L filled End of line Start line 196 going south End of line

ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB

170_1240 170_1159 170_1059 170_0959 170_0859 200_1220 200_1134 204_1051 204_0951 176_1220 176_1120 196_0943 196_0843 216_1331 216_1305 216_1205 220_1140 220_1040 192_1400 192_1314 192_1248 196_1230 196_1130 200_1022

4 4 5 5 3

5 3 5

3 4 4

5 6 5 5 5

5 5 6 5 5 4 4.6 6.19

21 17 14 11 12 4.7 181 196 171 176 155 358 348 178 171 195 176 160 163 171 175 138 178 175

8153 8143 8088 8002 7918 7833 7740 7667 7602 7497 7426 7270 7175 7097 7005 6966 6881 6846 6748 6746 6712 6594

8144 8089 8002 7919 7834 7742 7668 7603 7501 7427 7334 7271 7177 7136 7098 7006 6967 6882 6847 6750 6747 6713 6596 6459 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:59 9:43 12:46 12:38 11:59 10:59 13:14 12:14 11:29 10:51 13:02 12:20 13:51 13:29 13:05 12:05 11:40 14:17 13:58 12:57 12:48 12:30 11:22

9:59 8:59 9:51 9:43 8:43 12:40 11:59 10:59 12:20 11:34 10:51 12:20 11:20 13:31 13:05 12:05 11:40 10:40 14:00 13:14 12:48 12:30 11:30 10:22

170 170 170 170 170 200 200 204 204 176 176 196 196 216 216 216 220 220 192 192 192 196 196 200

31/08/2011 30/08/2011 29/08/2011 25/08/2011

46 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

End of line CTD

Heading to line 236 End of line Start line 240 heading south rough seas Start line 240 heading south rough

End of line CTD,

End of line

Start line 224

Start line 220 heading south, calm seas

End of line

Start line

ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB sk ZB sk ZB sk ZB ZB ZB ZB ZB ZB ZB ZB

212_1101 216_1009 216_0909 236_1350 236_1316 236_1257 236_1238 236_1153 240_1051 240_0951 224_1512 224_1504 224_1404 228_1332 228_1258 228_1158 224_1128 224_1028 220_0955 220_0855 220_0851 208_1332 208_1232 208_1131 212_1057 212_0957 212_0857 6 6 5

5 4 3 5 3 4

5 7 4 2 6 4 6 4

5 3 4 3 3 6.6 3.9 4.5 3.96 4.33

4 2 5

7 55 10 14 18 181 180 178 324 115 160 209 191 181 185 354 183 168 164 183 181 168 18.1

9744 9644 9581 9468 9446 9400 9376 9355 9353 9269 9177 9168 9162 9060 9032 8959 8829 8793 8684 8625 8510 8506 8503 8412 8329 8304 8238

9645 9582 9470 9448 9401 9377 9356 9354 9270 9179 9170 9163 9061 9033 5960 8830 8794 8685 8626 8511 8507 8503 8413 8333 8305 8239 8157 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:55 8:52 9:57 12:01 10:50 10:09 14:02 13:44 13:13 12:53 12:13 11:51 10:51 15:15 15:06 15:04 13:50 13:30 12:58 11:47 11:28 10:22 13:33 13:32 12:26 11:15 10:57

9:09 9:51 9:55 8:55 8:51 9:57 8:57 11:01 10:09 13:50 13:16 12:57 12:38 11:53 10:51 15:12 15:04 14:04 13:32 12:58 11:58 11:28 10:28 13:32 12:32 11:31 10:57

212 216 216 236 236 236 236 236 240 240 224 224 224 228 228 228 224 224 220 220 220 208 208 208 212 212 212

7/09/2011 6/09/2011 2/09/2011 12/09/2011

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 47 Multibeam Bathymetry Survey Rangiroa, French Polynesia

SVP error SVP error SVP error

SVP sync error Events reset to 1 after 9999 Events reset

DNP

Event reset

r2 sonic problem

DNP

Heading to line 208

sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk

243_1059 243_0959 172_1439 174_1242 174_1142 174_1115 174_1053 174_0953 243_1459 245_1402 245_1345 247_1244 249_1208 249_1151 249_1130 251_1032 251_1012 196_1415 208_1327 208_1308 208_1301 208_1216 208_1206 212_1201 174_11061 5 5

6 5 5 5 5 5 5

5 5 4 4 4

4 4 4 7

5 5 5 5 5 2 6

2 3

1 36 69 11 82 10 13 11 14 170 180 180 180 180 180 180 180 177 198 279 115 180

65 50 23 714 655 558 485 388 300 281 273 259 161 159 9991 9965 9947 9941 9872 9825 9810 9753 9751

66 51 656 560 490 389 301 283 275 261 163 160 9992 9981 9966 9961 9948 9942 9873 9827 9814 9811 9754 9752 9745 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

11:40 10:50 15:10 13:39 12;42 11:25 11:11 11:02 10:50 15:02 14:58 13:57 13:45 12:44 12:04 11:52 11:28 10:16 14:52 13;53 13:16 12;50 12:16 12:05

9:59 9:53 10:59 14:39 12:42 11:42 11:15 11:06 10:53 14:59 14:02 13:45 12:44 12:08 12:07 11:52 11:30 10:32 10:12 14:15 13:27 13:08 13:01 12:16 12:06 12:01

243 243 172 174 174 174 174 174 174 243 245 245 247 249 249 249 249 251 251 196 208 208 208 208 208 212

15/09/2011 14/09/2011 13/09/2011

48 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

DNP

1.5 to 2-m waves, SE winds around 15 kt 1.5 to 2-m waves, SE winds around SVP error Ctrl.dll error

Gyro error Gyro

SVP error

sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk

002_1234 010_1212 015_1155 009_1137 003_1122 004_1107 005_1051 007_1036 008_1021 006_0956 156_1332 156_1232 154_1216 154_1114 154_1022 154_0922 154_0909 154_0812 236_1408 238_1353 238_1311 238_1229 238_1215 238_1140 010_12266

4 3 3 4 4

5 4 3 3 2 4

4 4 4 4 4 4 4 4

5 5 5 5 5 5

8 12 10 112 358 342 149 323 152 333 125 347 152 180 180 180 180 180 180 180 180 761 213 123

909 887 820 759 744 1625 1607 1599 1587 1569 1549 1529 1509 1488 1487 1470 1388 2842 1282 1208 1146 1069 1059 1000

910 888 821 760 745 715 1608 1600 1589 1570 1553 1550 1530 1510 1489 1488 1471 1440 1389 2843 1283 1208 1147 1071 1060 1002 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:17 8:55 12:48 12:33 12:21 12:06 11:53 11:32 11:22 11:06 10:50 14:08 13:32 12:32 12:13 11:12 10:22 15:00 14:09 13:50 12:08 12;27 12:12

9:56 9:22 9:09 8:12 12:34 12:26 12:12 11:55 11:37 11:33 11:22 11:07 10:51 10:36 10:21 13:32 12:32 12:16 11:14 10:22 14:08 13:53 13:11 12:29 12:15 11:40

2 9 2 3 4 5 7 8 6

10 10 15 156 156 154 154 154 154 154 154 236 238 238 238 238 238

Avatoru pass Avatoru

26/09/2011 16/09/2011

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 49 Multibeam Bathymetry Survey Rangiroa, French Polynesia

NMEA error, bad data from device bad data from NMEA error, This line done previously 3 whales seen to the west

1 to 1.5-m waves, SE winds

1-m waves, SE winds 8.4 PR @ 28 m

Line to start 112

SVP error

SVP error DNP

1 to 1.5-m waves

sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk

150_1103 150_1012 152_0942 152_0810 104_1416 104_1338 104_1238 100_1153 100_1134 100_1037 100_0934 108_1424 108_1324 108_1222 120_1113 120_1013 120_0913 112_1316 116_1258 116_1253 116_1241 116_1230 116_1116 116_1056 116_0959 116_0859 112_14:16 5 5 5 5

5 5 5 5 5 5 5

5 5 5 4 4 4

6 6 5 4 4 4 5 5 5 5

3 8

6 6

13 28 13 64 180 168 180 182 181 190 167 165 162 191 169 164 164 161 142 146 179 176 149

3299 3209 3132 3090 3007 2924 2871 2782 2733 2706 2633 2557 2525 2423 2338 2266 2184 2097 1890 1876 1853 1847 1836 1829 1756 1725

3210 3134 3091 3009 2925 2872 2783 2735 2707 2634 2558 2526 2424 2339 2267 2185 2099 1891 1877 1856 1848 1837 1830 1762 1758 1727 1627 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:02 9:59 12:03 11:01 10:09 15:06 14:10 13:38 12:25 11:50 11:34 10:34 14:41 14:24 12:16 12:03 11;13 10:13 15:14 14:16 13:14 12:56 12;49 12:35 12:03 10:18

9:42 8:10 9:34 9:13 9:59 8:59 11:03 10:12 14:16 13:38 12:38 11:53 11:34 10:34 14:24 13:24 12:22 11:13 10:13 14:16 13:16 12:58 12:53 12:41 12:30 11:16 10:56

150 150 152 152 104 104 104 100 100 100 100 108 108 108 120 120 120 112 112 116 116 116 116 116 116 116 116

near the airport east end

east lagoon

east lagoon 30/09/2011 29/09/2011 28/09/2011 27/09/2011

50 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

Calm seas, winds from the south Calm seas, winds from

0.5-m waves

SSE winds, calm seas

0.5 to 1-m waves, NW winds

Very calm seas Very

Around the eastern Around end of lagoon Around the eastern Around end of lagoon

sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk

088_1336 088_1234 084_1107 084_1007 096_1404 096_1309 096_1204 092_1108 092_1008 044_1352 042_1236 042_1204 040_1105 036_1304 034_1213 034_1209 034_1131 032_1349 032_1319 032_1158 030_1049 152_1205 150_1203

6 6 6 6

5 5 6 7 6

4 4 6 6

6 6

6 6 6 6

5 4

? 2 ? 3 1

4 7

10 2.8 350 360 180 186 180 173 177 178 175 178

4873 4768 4655 4563 4448 4436 4341 4227 4121 4011 3952 3883 3845 3743 3651 3568 3488 3459 3410 3358 3342 3304

4770 4656 4564 4450 4437 4343 4228 4122 4012 3953 3885 3846 3744 3652 3570 3569 3489 3460 3412 3360 3343 3306 3300 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

14:27 13:29 11:58 11:07 14:11 14:01 13:01 12:04 11:08 14:30 13:23 12:32 12:00 13:54 12:56 12:12 12:09 14:05 13;45 12:42 11:47 12:29 12:05

1352 13:36 12:34 11:07 10:07 14:04 13:09 12:04 11:08 10:08 12:36 12:04 11:05 13:04 12:13 12:09 11:31 13:49 13:19 11:58 10:49 12:05 12:03

88 88 84 84 96 96 96 92 92 44 42 42 40 38 36 36 34 32 32 32 30 152 150

eastern lagoon

eastern most end

6/10/2011 5/10/2011 4/10/2011 3/10/2011 2/10/2011

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 51 Multibeam Bathymetry Survey Rangiroa, French Polynesia

End of line

Heading south, calm seas

SVP error, simbox error SVP error, Simbox error Sync out error Start line 56, northeast, sync out error

End of line

End of line Sync out error Start line, rough seas, SE winds, R2sonic error Start line, rough

End of survey Start line 50 from southeast, R2sonic sync out error Start line 50 from Data sync out error, end of line Data sync out error, Start line 48 from northeast, rough seas northeast, rough Start line 48 from

End line Start line 46 from south Start line 46 from Rough seas, end of line

End of line

Start line 80, rough seas Start line 80, rough

ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB ZB

56_1134 56_1125 56_1105 56_1101 54_1312 54_1237 52_1140 52_1119 52_1039 184_1204 188_1142 188_1042 182_1003 182_0904 050_1331 050_1250 048_1149 048_1135 046_1241 046_1141 044_1055 080_1136 080_1036 080_0936 4 7 5

5 5 4

5 3 4 6

4 5 5

5 5 6.8 5.8 5.8 5.78 5.78 5.31 4.96 5.13 5.76

14 1.2 178 175 192 165 177 144 171 329 180 174 182 229 358 170 193 304 42.9 20.3 25.4 176.9 188.6 166.3

6457 6329 6296 6167 6115 6006 5988 5979 5953 5951 5871 5825 5746 5715 5699 5637 5578 5477 5456 5442 5341 5268 5249 5063

6330 6297 6169 6116 6008 5989 5981 5956 5952 5872 5826 5747 5716 5701 5638 5579 5478 5457 5443 5342 5270 5250 5064 4874 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:59 13:04 11:57 11:42 10:28 11:46 11:29 11:21 11:03 13:57 13:02 12:33 11:37 10:47 14:07 13:24 12:44 11:46 12:48 12:41 11:35 11:40 11:36 10:36

9:04 9:36 12:04 11:42 10:42 10:03 11:34 11:25 11:05 11:01 13:12 12:37 11:40 11:19 10:39 13:31 12:50 11:49 11:35 12:41 11:41 10:55 11:36 10:36

56 56 56 56 54 54 52 52 52 50 50 48 48 46 46 44 80 80 80 184 188 188 182 182

17/11/2011 27/10/2011 26/10/2011 25/10/2011 24/10/2011 21/10/2011

52 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

Restarted, matrix problem

Start line- heading south east

End of line

ZB sk ZB sk sk sk sk ZB sk ZB sk sk ZB sk ZB sk ZB sk sk sk sk sk sk sk sk sk sk

62_1358 62_1333 60_1326 60_1226 58_1112 58_1103 58_1057 56_1019 56_0952 008_1135 090_1126 010_1116 011_1107 012_1059 013_1050 014_1042 015_1033 016_1024 017_1015 018_1004 019_0953 020_0923 021_0914 001_0854 178_1430 178_1330 184_1304 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5

7 7 7 5 6 6

5 6.3 6.34 7.04

85 73 78 79 72 88 4.3 2.8 284 286 105 300 294 292 315 312 180 357 356 168 174 356 177 160 358 13.2

7376 7363 7351 7339 7327 7315 7302 7289 7276 7264 7252 7239 7203 7176 7085 7043 7034 6911 6786 6778 6703 6650 6619 6497

7365 7352 7340 7328 7316 7304 7291 7278 7265 7253 7241 7228 7204 7193 7178 7087 7045 7035 6912 6797 6782 6779 6704 6651 6620 6498 6458 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:21 11:40 11:33 11:23 11:15 11:06 10:58 10:48 10:41 10;30 10:23 10:12 10:02 14:41 13:53 13:30 13:26 12;07 11:10 10:56 10:17 14:45 14:30 13:22

9:53 9:23 9:14 8:54 9:52 11:35 11:26 11:16 11:07 10:59 10:50 10:43 10:33 10:25 10:15 10:04 13:58 13:33 13:26 12:26 11:12 11:03 10:57 10:19 14:30 13:30 13:04 8 9 1

10 11 12 13 14 15 16 17 18 19 20 21 62 62 60 60 58 58 58 56 56 178 178 184 habitat habitat habitat habitat habitat habitat habitat habitat habitat habitat habitat habitat habitat habitat habitat

2/12/2011 21/11/2011

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 53 Multibeam Bathymetry Survey Rangiroa, French Polynesia

Data fill

Cross line Cross

On line 5

sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk

001_749 007_725 019_1247 017_1239 015_1227 006_1219 006_1200 001_1148 002_1108 002_1043 002_0943 001_0927 001_0827 007_0806 001_0708 001_1319 002_1310 003_1301 004_1254 005_1232 006_1225 003_1205 004_1154 007_1141 5 5 5 5 5 5

5 5 5 5 5

5 5

7 5 5 5 5 5

5 5

60 35 30 82 80 15 92 154 202 214 145 119 101 280 281 168 133 184 279 270 279 206

7879 7865 7852 7844 7830 7803 7761 7679 7662 7522 7501 7499 7488 7473 7460 7447 7430 7408 7388

7880 7866 7853 7846 7830 7807 7796 7762 7680 7663 7564 7532 7502 7502 7500 7488 7475 7462 7449 7436 7409 7390 7377 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:38 9:27 7:38 7:25 12:45 12:27 12:22 12:17 12:00 11:14 11:01 10:43 13:25 13:16 13:00 12:40 12:31 12:19 12:05 11:48 ######

9:43 8:27 7;49 7:25 7:08 12:47 12:39 12:27 12:19 12:00 11:48 11:08 10:43 13:19 13:10 13:01 12:54 12:32 12:25 12:06 11:54 11:41 009:27 6 6 1

2 2 2 1 1

7 1 7 1

1 2 3 4 5 6

3 4

7 19 17 15 Tiputa pass Tiputa pass Tiputa pass Tiputa pass Tiputa pass Tiputa pass

Avatoru offshore Avatoru Avatoru offshore Avatoru Avatoru offshore Avatoru Avatoru offshore Avatoru Avatoru offshore Avatoru

Tiputa pass Tiputa pass Tiputa pass Tiputa pass

habitat habitat habitat habitat habitat habitat

tiputa pass tiputa pass

habitat 4/12/2011

54 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

Channel

Data fill Freq 200 abs 89 Pr 1.5 pulse 500 Freq

V feature jetty V feature

sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk

011_1136 011_1036 011_0936 011_0836 231_1225 231_1124 234_1024 004_1532 004_1431 004_1431 002_1257 002_1226 006_1127 004_1036 001_1002 001_0902 001_0802 075_1414 075_1314 070_1225 070_1125 065_1058 065_0958 021_1310 0234_0924 7 5 5 5

5 5 5 5

4 4 7 6 6 7 6 6 6

6 5 6 5 5 5

5 9

30 95 86 20 54 47 139 136 157 107 350 166 180 203 210 279 350 174 178 178 180

9648 9532 9411 9299 9208 9142 9051 8993 8899 8897 8820 8702 8636 8517 8388 8324 8220 8119 8097 8078 8064 8044 8016 7898

9533 9412 9300 9209 9143 9053 8994 8900 8820 8719 8680 8642 8518 8408 8325 8221 8121 8099 8079 8064 8045 8017 7900 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:36 9;02 12:24 11:36 10:36 13:05 12:18 11:07 10:24 15:31 14:31 13:23 12:22 11:25 10:34 10:02 15:06 13:55 13:01 12:25 11:16 10:58

9:36 8:36 9:24 9:02 8:02 9:58 11:36 10:36 12:25 11:24 10:24 15:32 14:31 13:31 12:58 12;26 11;27 10:36 10:02 14;14 13:14 12:25 11:25 10:58

4 4 4 2 2 6 4 1 1 1

11 11 11 11 75 75 70 70 65 65 21 231 231 234 234

northeast offshore

west

offshore northwest offshore

eastern lagoon

Tiputa pass 8/12/2011 7/12/2011 6/12/2011 5/12/2011

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 55 Multibeam Bathymetry Survey Rangiroa, French Polynesia

Data fill Data fill

sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk

005_1151 005_1150 002_1018 002_0954 001_0848 004_1159 004_1059 036_1047 036_0947 036_0940 035_0927 033_0917 031_0909 029_0901 001_0853 025_0829 023_0817 021_0805 009_1554 009_1454 009_1354 010_1309 009_1234 008_12:10 001A_0927 5 5 5 5 5

5 5

3 3 5 5 5 5 5 5 5 5 5

5 5 5 6 5

90 90 29 46 25 26 28 28 36 36 34 236 320 320 300 280 280 320 322 150 321 321 304 311 298

894 876 776 775 771 761 749 738 725 713 701 690 680 671 660 374 284 1328 1247 1221 1150 1045 1015

927 896 877 777 773 772 762 751 739 726 714 702 691 681 672 666 540 400 284 1248 1237 1151 1057 1016 9691 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:51 9:46 9:38 9:25 9:15 9:08 9:00 8:42 8:25 8:14 12:52 12:09 11:39 11:05 10:09 12:11 11:59 10:50 10:47 15:59 15:54 14;54 13:51 13:10

9:54 9:04 8:48 9:47 9:40 9:27 9:17 9:09 9:01 8:53 8:29 8:17 8;05 12:10 11:51 11:05 10:18 11:59 10:59 10:47 15:54 14;54 13:54 13;09 12:34 8 5 5 2 2

1 1

4 4

9 9 9 9 36 36 36 35 33 31 29 25 23 21 10 Avatoru shoreparallel Avatoru Avatoru shoreparallel Avatoru Avatoru shoreparallel Avatoru Avatoru shoreparallel Avatoru Avatoru shoreparallel Avatoru

Tiputa pass

Avatoru offshore Avatoru Avatoru offshore Avatoru

Tiputa pass Tiputa pass Tiputa pass Tiputa pass Tiputa pass Tiputa pass Tiputa pass Tiputa pass Tiputa pass Tiputa pass Tiputa pass

9/12/2011 11/12/2011

56 SPC SOPAC TECHNICAL REPORT (PR106) Multibeam Bathymetry Survey Rangiroa, French Polynesia

Latency Latency

sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk sk

009_0834 004_1313 004_1257 006_1202 003_1112 003_1046 003_1033 001_1027 003_1021 005_1015 007_1010 009_1004 011_0957 011_0951 009_0945 007_0939 005_0933 003_0927 001_0921 004_1308 008_1256

5 5 5 5

7 3 5 5 5 5 5 5 5 5 5 5 5 5

5 5

56 41 80 83 97 96 88 97 75 120 289 192 276 280 273 273 259 268 259 275 154

1865 1825 1792 1745 1640 1533 1523 1514 1504 1494 1485 1476 1466 1456 1446 1436 1427 1416 1396 1382 1340

1834 1792 1747 1640 1534 1525 1516 1506 1496 1486 1477 1468 1458 1448 1438 1428 1419 1400 1386 1340 1334 SOPAC MULTIBEAM ONLINE LINE LOG R2 SONIC 2024 MULTIBEAM SOPAC

9:56 9:50 9:44 9:38 9:32 9:25 13:29 13:10 12:55 12:02 10:49 10:41 10:32 10:26 10:20 10:14 10:09 10:02 13:27 13:08 08"51

8:34 9:57 9:51 9:45 9:39 9:34 9:27 9:21 13:13 12:57 12:02 11:12 10:46 10:33 10:27 10:21 10:15 10:10 10:04 13:08 12:57

4 4 6 3

3 3 1 3 5 7 9 9 7 5 3 1

4 8 11 11

Avatoru shoreparallel Avatoru

patch test Dec patch test Dec patch test Dec patch test Dec patch test Dec patch test Dec patch test Dec patch test Dec patch test Dec patch test Dec patch test Dec patch test Dec patch test Dec patch test Dec

Avatoru shoreparallel Avatoru Avatoru shoreparallel Avatoru 13/12/2011 12/12/2011

SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106) 57 Multibeam Bathymetry Survey Rangiroa, French Polynesia

58 SPC SOPAC TECHNICAL REPORT (PR106) SPC SOPAC TECHNICAL REPORT (PR106)