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FINAL FIELD REPORT PHASE II MATTHEW HYDROGRAPHIC SURVEY LABRADOR

Project MAT-00-039 Document No. 2600292 August - October 2000

Canadian Hydrographic Service Department of Fisheries and Oceans Northwest Atlantic Fisheries Centre St. John's, Newfoundland

Andre Roy Hydrographer-in-Charge VK 591 Fisheries Poches .C3 1+1 and Oceans at Oceans R613 2000 The picture on the cover page is "Hole in the wall" at Cape St. Michael, Lat. 52° 41'15"N, Long. 55° 46'00"W. TABLE OF CONTENTS TABLE OF CONTENTS 2

INTRODUCTION 3

DELIVERABLES 5

FIELD TRAINING 7

FIELD BETA TESTING 8 HHUnurms 8 HHVIEWER 8 HIPS 4.3.3G 9 RECOMMENDATIONS 10

CONCLUSION 11

APPENDIX 12 PROJECT STATISTICS 13 HYDROGRAPHIC PERSONNEL 14 INFORMATICS OUTLINE 15 CHRONOLOGY OF MAJOR EVENTS 16 SURVEY PLATFORMS AND EQUIPMENT 19 SURVEY PLATFORMS 19 MAJOR SURVEY EQUIPMENT 21 HARDWARE AND SOFTWARE 21 FLOOR 3D IMAGE GALLERY 23

DIAGRAMS 25 CHART COVERAGE .26 FIELD SHEET COVERAGE 27 SOUNDING COVERAGE ...30 FOX HARBOUR INVESTIGATION SURVEY .32 Fisheries and Oceans Canada

2 9 JUN 2006

NAFC Library - NL. degion

Canadian Hydrographic Service Atlantic 2 Final Field Report 2000 Labrador Surveys INTRODUCTION

The Labrador coastline extends over 8000 km. from Cape Chidley, south to the Strait of Belle Isle. There are innumerable bays, inlets and off-lying islands with an extremely complex seafloor. Deep trenches, shallow water shoal-infested areas, and rapidly changing depths provide a challenge to even state-of-the-art hydrographic survey systems. Reduced visibility in fog, ice-infested waters, isolation, and a short survey season make this coastal area one of the most challenging places in the world to conduct hydrographic surveys. Vast areas of the coastline have never been surveyed, and the majority of the areas that have been surveyed, do not meet modern hydrographic standards. This fact was recognized in the Neilsen's Annual Fishery Report of the Newfoundland Department of Fisheries in 1894 quoting "The existing charts are not reliable beyond Cape Harrigan, and it is a great peril to life and property that our fishermen venture into these unknown regions. An application to the Imperial Government for a vessel to survey this uncharted coast would, doubtless, receive attention. The work is urgently needed."

The hydrographic surveys considered in this final field report were identified by clients, to meet their needs to improve the safety of navigation. The areas surveyed include (see Diagram 1 to 6 for geographic extent and location):

1. Entrance to Deer Pass through Caplin Bay. A multi-beam hydrographic survey was conducted to increase the density of existing soundings in this very narrow route. This information will permit scale charting for use by mariners when navigating in the passages between Harper Island, Stag Island, Big Island and Entry Island.

2. Hawke Bay. A single-beam survey was conducted from east of Pigeon Island to the bottom of Hawke Bay. This information will be useful for general navigation and for fisheries-related activity.

3. Entrance to Otter Bay. A multi-beam hydrographic survey was conducted to increase the density of existing soundings for larger scale charting. This survey covers the areas from Cape Bluff to Cooper Head, and includes the very protected areas of Snug Harbour and Lord Arm.

4. Passage through the Dead Islands. A single-beam hydrographic survey was conducted to open an inside route between Triangle Harbour and Duck Island. This passage will offer protection for small boats from heavy northeast seas.

Canadian Hydrographic Service Atlantic 3 Final Field Report 2000 Labrador Surveys 5. Passage through Shoal Tickle. A multi-beam hydrographic survey was conducted to increase the density of existing soundings in this narrow route. This will permit larger scale charting and give the mariner an alternate route to St. Michaels Bay.

6. St. Michaels Bay. Multi-beam and single-beam hydrographic surveys were conducted to increase the soundings in this very narrow and shallow route: This information will permit larger scale charting and give the mariner an alternate route from St. Micheals Bay to White Bear Arm.

7. Bottom of White Bear Arm. A multi-beam hydrographic survey was conducted to increase the density of existing soundings required for larger scale charting. This information will be used for general navigation and fisheries-related activities.

8. Occasional Harbour. A multi-beam hydrographic survey was conducted to increase the density of existing soundings required for larger scale charting. This area provides excellent shelter against bad weather from any direction. It is also an excellent anchorage ground for vessels of various sizes.

9. Pinsent Arm. A multi-beam hydrographic survey was conducted to increase the density of existing soundings required for larger scale charting.

10. Coastal areas from Cape Bluff Island to Ship Head. A multi-beam hydrographic survey was conducted to increase the density of existing soundings required for larger scale charting of these coastal waters. This survey also included the well-protected summer station of Triangle Harbour and approaches, the summer station of Square Harbour and the continuation of the Entrance to Otter Bay.

11. Investigation survey at the Entrance to Fox Harbour. A multi-beam hydrographic survey was completed at the entrance to Fox Harbour. During the 2000 shipping season the MV Mokami, a medium size tanker carrying refined petroleum products, grounded while departing this port. The preliminary results of this survey indicate a shoal in the entrance to Fox Harbour. This shoal is shallower than charted by approximately 1.0 meter and may be where the vessel struck. As a direct result of this survey a Notice to Shipping and a Notice to Mariners actions have been issued to update the chart.

Canadian Hydrographic Service Atlantic 4 Final Field Report 2000 Labrador Surveys DELIVERABLES The deliverables of the Matthew Phase II hydrographic survey in Labrador include cleaned and processed hydrographic data sets for use in production of nautical products, as listed in the table below. It is a policy of CHS (Atl.) Newfoundland that hydrographic data collected during a field season be processed, cleaned and delivered to the client in the form of new or updated nautical products, in time for the next year's navigational season. Tables 1 and 2 list these data sets and subsequent nautical products.

Field Title Scale Date of Submission Sheet # 1001263 Hawke Bay Eastern Portion 1:10000 01 March 2001 1001264 Hawke Bay Western Portion 1:10000 01 March 2001 1001265 Caplin Bay and Approaches 1:10000 01 March 2001 1001266 East of Stone Island 1:10000 01 March 2001 1001267 Cooper Island and Approaches 1:10000 01 March 2001 1001268 Northern Entrance to Caplin Bay 1:5000 01 March 2001 1001269 Caplin Bay West 1:10000 01 March 2001 1001270 Hawke Harbour and Approaches 1:5000 01 March 2001 1001271 Dead Islands 1:10000 01 March 2001 1001272 Square Island 1:10000 01 March 2001 1001273 Cape St. Michael 1:10000 01 March 2001 1001274 Occasional Harbour 1:10000 01 March 2001 1001275 Dead Islands Bay 1:10000 01 March 2001 1001276 Long Island to Juniper Island 1:10000 01 March 2001 1001277 Shoal Tickle 1:5000 01 March 2001 1001278 Pinsent Arm 1:2000 01 March 2001 1001279 St. Michaels Bay 1:5000 01 March 2001 1001280 White Bear Arm 1:10000 01 March 2001 1001281 Charlottetown Wharf 1:10000 01 March 2001 1001282 Ship Harbour Head to Cape Bluff 1:20000 01 March 2001 1001283 Cape Bluff to Cooper Head 1:20000 01 March 200,1 1001284 Entrance to Fox Harbour 1:2000 01 March 2001

Table 1. Cleaned and processed data sets.

Canadian Hydrographic Service Atlantic 5 Final Field Report 2000 Labrador Surveys Product Title Publication Scale date

POD NC 5033 Hawke Bay and/et Deer Pass (Squasho Run) Summer 1:30,000 2002

Insets Northern Entrance to Caplin Bay 1:20,000 Northern Entrance to Deer Pass 1:15,000

Continuation Head of Hawke Bay 1:30,000

POD NC 5032 Approaches to/a White Bear Arm Winter 2002 1:30,000

Insets St. Michaels Bay 1:12,000 Pinsent Arm 1: 5,000 Shoal Tickle 1:12,000

Continuation Occasional Harbour 1:30,000 POD NE 4702 Corbet Island to/a Ship Head Harbour Fall 2002 1:75,000 (Cancellation of St. Michaels Bay Inset) Sailing Labrador and Spring 2001 Direction

Table 2. New and updated nautical products.

Canadian Hydrographic Service Atlantic 6 Final Field Report 2000 Labrador Surveys FIELD TRAINING

For the duration of the Matthew Phase II Labrador survey, on-the-job training was provided to all hydrographers in the use and operation of the various sounding systems and processing software related to the survey. This training allowed hydrographers to become proficient in many aspects of the survey operations, which in turn, allowed flexibility in the development of a rotational staff assignment schedule. The schedule permitted hydrographers to be assigned a variety of tasks, avoiding the monotony of a long duty assignment.

Field training consisted of two (2) days mentoring by a more experienced hydrographer. The trainees' work was closely supervised enabling them to easily call upon the mentor or Project Supervisor for support. Training was provided in the following areas:

EM100 data acquisition session and the first step of processing in HDCS: -D. McCarthy

EM3000 data acquisition session: D. McCarthy D. Street

Subset processing in HDCS: D. McCarthy D. Street M. Nickerson

HHUtilities and HHViewer B.Curran

HYPACK MAX in single-beam acquisition session: J. Manning D. McCarthy

Canadian Hydrographic Service Atlantic 7 Final Field Report 2000 Labrador Surveys

FIELD BETA TESTING

HHUtilities The HHUtilities is a series of software used to transform and manipulate data in a database self-defined structure. The most important aspect of this software series to be tested was the HHClean utility. This software is an automated way of cleaning bathymetric data with variable cell size according to the roughness of the bottom. Many difficulties were encountered to fine-tune the software setting for optimal results of the automated cleaning. Modifications had to be done to the software to suit the complexity of the Labrador seafloor.

HHViewer The HHViewer software (Fig. 1) was used on this survey as a multi-beam quality control tool. Many tests of the software were conducted and modifications made towards increasing the speed and efficiency of the software. The viewer was also used to compare single-beam sounding with multi-beam. Again it was a very useful and powerful comparison tool. The ability to view data in three-dimension (3D) during the multi-beam data cleaning process was a great advantage in the comprehension and detection of artifacts in the data. All the data have been reviewed using this tool and many corrections have been made to ensure the quality of the processing and the cleaning of the data collected during the survey. It is recommended that this process should become a mandatory step during the production of multi-beam data sets.

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Canadian Hydrographic Service Atlantic 8 Final Field Report 2000 Labrador Surveys HIPS 4.3.3g Comments for continuous improvements for HIPS 4.3.3g have been transmitted and will be implemented in a subsequence version by USL.

Continuous improvements.

1- Navigation editor: Reduce the minimum length of the Gyro display to clear the next navigation dot. Keep more information from the GGA string for malfunction inquiry and auto cleanings. Ex: Minimum number of satellites Age of correction HDOP DGPS

2- Attitude editor: Set filter for Gyro Value over 360 ° Heave over XX m Pitch and Roll over 90°

Canadian Hydrographic Service Atlantic 9 Final Field Report 2000 Labrador Surveys RECOMMENDATIONS

1- To keep the informatics infrastructure onboard the CCGS Matthew for the duration of the survey season.

2- To install an automatic high-capacity back-up system as part of the standard processing infrastructure equipment onboard the CCGS Matthew.

3- To add a CD writer onboard the launch Plover as a backup system to the network connection or an easy transfer method of data for a shore-based survey. The system in place is an exabyte tape mounted on UNIX platform. This technology does not permit the transfer from UNIX platform to WinNT platform for processing.

Note: These recommendations have already been addressed to the proper section or committees.

The following recommendations were made in last year's report but have not yet been addressed. I hope that resources will be made available in the near future to make these improvements.

1- To add a high-frequency chip inside the Knudsen echo sounder. This will provide better definition of the seafloor and a better paper graphic for shallow water. Also for the very shallow water, the resolution of the low frequency is not adequate for hydrographic work.

2- To redesign the inside of the computer room and the hydrographic acquisition room to provide more ergonomic workstations.

3- To install network outlets inside the hydrographic launches.

4- To add the latter to access the launches from the back deck when the launches sit in their davits on the CCGS Matthew.

Canadian Hydrographic Service Atlantic 10 Final Field Report 2000 Labrador Surveys CONCLUSION

The main objective of this survey was to complete the acquisition of new hydrographic information necessary to produce new charts for navigation and to depict new shipping corridors in the areas from Ship Harbour Head to Caplin Bay. This objective was attained.

The majority of the equipment performed to my satisfaction, with only minor problems occurring that were resolved onsite without any major loss of survey time.

The high quality and dedication of the personnel assigned to the project are the fundamental reasons for the success of the survey. I enjoyed working with these people as they made the duty of Hydrographer-in-charge an easy task. I would like to salute their willingness and dedication to accomplishing the various tasks they were assigned.

Andre Roy Hydrographic Project Supervisor CHS DFO, Newfoundland

Canadian Hydrographic Service Atlantic 11 Final Field Report 2000 Labrador Surveys APPENDIX

Canadian Hydrographic Service Atlantic 12 Final Field Report 2000 Labrador Surveys PROJECT STATISTICS

VEHICLES Ships 1 CCGS Matthew Launches 2 CSL Plover and CSL Pipit Helicopters 1 Contract Hours flown 9 PERSONNEL Hydrographers 7 CHS Atlantic Region Technicians 2 Engineering and Technical Services BIO. Ships Officers and Crew 26 CCGS Matthew (two crew) WORK RECORD Total days in field 53 Sounding days lost to weather 3 Sounding days lost to equipment failure 1 Travel days 4 Actual days worked 53 SURVEY STATISTICS Patch test performed Sq. km sounded CCGS Matthew 324 EM 100 Sq. km. sounded Plover 207 EM 3000 Sq. km sounded Pipit 55 Single-beam Total sq. km. sounded 554 Shoals examined 424 Benchmarks recovered and leveled 12 Benchmarks established and leveled 3 Benchmarks leveled to ellipsoid 3 Norman's Cove, Square Island, Charlottetown Temporary tide gauge sites 3 Norman's Cove, Square Island, Pinsent Arm Fixed aids positioned 7 Floating aids positioned 17 Horizontal control stations recovered 1 Horizontal control stations established - Wharves surveyed 1 Pinsent Arm Notice to Shipping 1 Investigation survey in Fox Harbour. Shorelining km. -

Canadian Hydrographic Service Atlantic 13 Final Field Report 2000 Labrador Surveys HYDROGRAPHIC PERSONNEL:

Hydrographic Personnel CHS Newfoundland

Roy, Andre Hydrographic Project Supervisor, August 08 — October 04 CHS Atl. Newfoundland Manning, Joseph Hydrographer, CHS Atl. Newfoundland August 08 — October 04 Curran, William Hydrographer, CHS Atl. Newfoundland August 08 — October 04 Street, David Hydrographer, CHS Atl. Newfoundland August 08 — October 04 Nickerson, Michael Hydrographer, CHS Atl. Newfoundland August 08 — October 04

Hydrographic Personnel CHS Maritimes

McCarthy, Dave Hydrographer, CHS Atlantic August 08 — October 04

Geomatic Support Bedford Institute of Oceanography (B.I.0)

Norton, Larry I Informatics, CHS Atlantic I July 05 — August 08

Engineering and Technical Services, Bedford Institute of Oceanography (B.I.0)

Eisenor, Don Electronics Technician, CHS Atlantic August 08 — September 01 Gallant, Roger Electronics Technician, CHS Atlantic September 02 — October 04

Canadian Hydrographic Service Atlantic 14 Final Field Report 2000 Labrador Surveys INFORMATICS OUTLINE

IP Address Name Operating System Main Duty 198.165.44.23 PLOTTER N/A Large Plotter. 198.165.44.169 PRINTER N/A Letter and Legal size Printer. 198.165.44.212 CHSPC10 WindowsNT Workstation Multi-beam Process and Zip Drive access. 198.165.44.83 CHSPCLOAN WindowsNT Workstation Multi-beam Process on the bridge of the CCGS Matthew. 198.165.44.72 CHSNT1 WindowsNT Server CARIS server, Account server, Single-beam process, Administration 198.165.44.73 CHSNT2 WindowsNT Server Data Q.C., Disk Space server and Back-up. 198.165.44.64 CHSLAP4 Windows 95 Tide Download and Microsoft Office. 198.165.44.66 CHSPC2 Windows 95 Digitizer and Microsoft Office. 198.165.44.75 CHSPC8 Windows 95 H.I.C. PC 198.165.44.90 PLOVER Unix EM3000 acquisition platform. 198.165.44.9 SPRFS4 Unix EM100 acquisition platform. none DEAWOO Windows 95 Tide Download and Microsoft Office.

Mapped drive X: \\CHSNTI\Apps (Access CARIS Applications) Y: \\CHSNT2\Hips (Access Disk Space) Z: \\CHSPC10\D (Access the ZIP 250 MB)

Canadian Hydrographic Service Atlantic 15 Final Field Report 2000 Labrador Surveys MISSING PAGE August 27 Survey operations using the CCGS Matthew were completed as required for New Chart 5033, Hawke Bay and/et Deer Pass (Squasho Run).

GPS leveling data were acquired at the Norman Bay tide station 1214.

August 29 99% of the sounding is completed for Chart 5033. Only a few shoals and rock verifications are left.

August 30 Ship moved to Charlottetown.

August 31 The CCGS Matthew investigated a shipping incident at Fox Harbour. One benchmark was recovered and identified as unstable.

Sept. 01 The CCGS Matthew moved to St. Anthony for a crew change and all hydrographers left for a three-day weekend home.

Sept. 05 All hydrographers returned to the ship after the weekend at home. Hydrographers' assignments were rotated. Due to bad weather the departure was delayed.

Sept. 06 The CCGS Matthew departed St. Anthony for Fox Harbour Two new benchmarks were installed in Fox Harbour. Physical verification of the shoal surveyed on August 31 was completed.

Sept. 08 The ship arrived in St. Michaels Bay (5032) to resume the hydrographic survey.

Sept. 13 The CCGS Matthew was at Charlottetown due to bad weather conditions. Inspection, maintenance, leveling of benchmarks and GPS leveling of the tide station 1212 were completed.

Sept. 15 The survey of the passage between Shoal Tickle and Triangle Harbour on Chart 5032 was completed. The sounding from the CCGS Matthew necessary for Chart 5032 was completed.

Sept. 16 The DGPS reference station on Stony Island was inspected and was working properly. The survey of Hawke Bay for Chart 5033 was completed. The survey was completed as require for Chart 5033.

Sept. 20 Rotation of hydrographic personnel.

Sept. 21 Survey operations continued with collection of data required for production of New Chart 5032, including positioning and describing navigational aids, shoreline verification and Sailing Directions Revision.

Sept. 22 The multi-beam survey for Pinsent Arm and Occasional Harbour was completed.

Sept. 23 GPS leveling data were acquired at the Square Island tide station 1202. All tide stations of the survey areas were tied to the ellipsoid with a 24-hour GPS survey.

Sept. 29 End of the sounding operation for the CCGS Matthew.

Canadian Hydrographic Service Atlantic 17 Final Field Report 2000 Labrador Surveys Sept. 30 End of the single-beam sounding operation for the launch Pipit.

Oct. 01 The tide gauges in Pinsent Arm and Square Island were dismantled. Navigation Aids survey was completed. End of the sounding operation for the project. The ship moved to Otter Bay.

Oct. 02 The tide gauge in Norman's Cove was recovered. Contracted helicopter was used to recover the DGPS shore station. Survey operation was completed. The ship departed the survey areas for St. John's, Newfoundland.

Oct. 04 The CCGS Matthew arrived in St. John's Harbour. The demobilization of the CCGS Matthew was completed.

Canadian Hydrographic Service Atlantic 18 Final Field Report 2000 Labrador Surveys SURVEY PLATFORMS AND EQUIPMENT

SURVEY PLATFORMS

Figure 2. CCGS Matthew CCGS Matthew: Length=51m; Beam=10.5m; Draft=3.3m Crew: 13 people. EM100 platform Carrier of the two hydrographic launches.

Canadian Hydrographic Service Atlantic 19 Final Field Report 2000 Labrador Surveys Survey Platforms (continued):

Figure 3. Hydrographic Survey Launch

CSL Plover: (Length=9.4m) Equipped with radar, SSB radio, VHF radio, magnetic and fluxgate compasses. Used as EM3000 multi-beam platform.

CSL Pipit: (Length=9.4m) Equipped with radar, SSB radio, VHF radio, magnetic and fluxgate compasses. Used as single-beam platform.

Zodiac: Rigid-bottom inflatable (Length 4.9m) with twin 60 HP outboard engines.

Helicopter: Bell 206 (under contract from Canadian Helicopters Inc.)

Canadian Hydrographic Service Atlantic 20 Final Field Report 2000 Labrador Surveys MAJOR SURVEY EQUIPMENT

1 Wild DI-20 EDM c/w 2 NiCad batteries and charger. 1 Wild NA2 levels. 1 Leica TC1800 total station. 2 Ashtech Z12 GPS dual frequency geodetic receivers. 1 Garmin GPS38 personal navigator. 3 Wild Prisms: (1—GPH11 bank, 1—GPH3 bank, 1-GPH1Z single/target). 7 Standard Horizon VHF marine band radios. 3 Sutron tide gauges.

HARDWARE AND SOFTWARE

Data Collection:

1 Sun Microsystems SPARC 2 (sprfs4) c/w 2GB disc drive and Mermaid software for EM 100 data collection.

1 Sun Microsystems ULTRASPARC Solaris 3.5.1 c/w two 9GB disc drive and NEPTUNE ver. 4.0uE software for EM3000 data collection, and real time processing.

1 DAEWOO pentium class laptop equipped with: SVP ver. 2.3 PROCOMM PLUS ver. 2.01 QUAD ver. 22/04/92, CIS (Nfld. provincial control database) ver. 96.1 Standard Microsoft software.

PSION data logger.

1 Pentium class PC (Plover) operating with WINDOWS NT ver. 4.0 with: POS/MV ver. 2.24 software.

2 Pentium class PC (Pipit, CCGS Matthew) operating with WINDOWS NT ver. 4.0 with: WINSAT ver. 2.0 software.

Echo sounder:

1 Simrad EM3000 multi-beam sounder (launch Plover). 1 Simrad EM 100 multi-beam sounder (CCGS Matthew). 1 Knudsen 320M single-beam digital sounder (launch Pipit).

Canadian Hydrographic Service Atlantic 21 Final Field Report 2000 Labrador Surveys Positioning Systems:

1 DGPS reference station consisting of a Novatel Millenium dual-frequency Geodetic GPS receiver, a Pacific Crest RFM96W UHF radio modem c/w 35 watt linear amplifier, and a Global Thermal 120 watt electric generator.

4 Novatel 3951R single-frequency GPS receivers, one in each launch, one on CCGS Matthew, and a spare.

4 Pacific Crest RFM96W UHF 2 watt radio modems, one in each launch, one on CCGS Matthew, and one spare.

3 CSI MF MBX-2 Radio Beacon Receivers, one in each launch and one on CCGS Matthew.

1 POS/MV "positioning and orientation sensor ".

1 TSS335B motion sensor.

Data Processing Systems:

1 Windows NT 4.0 Dell 4200 server equipped with: HIPS ver. 1.0 NT Used for the cleaning of multi-beam data. CARIS ver. 4.3.3 Used to manipulate and view data

1 Windows NT 4.0 Dell Power Edge 6300 server equipped with: HHViewer 1.0 Used for 3D QC. of bathymetric data. HHUtility 1.0 Preparation and cleaning on SDS structure.

1 Windows NT 4.0 Dell Precision 220 workstation equipped with: HHViewer 1.0 Used for 3D QC. of bathymetric data. HHUtility 1.0 Preparation and cleaning on SDS structure. Other standard Microsoft software

2 Pentium class PC's Equipped with WINDOWS 95, SVP ver. 2.3, PROCOMM PLUS ver. 2.01, QUAD ver. 22/04/92 CIS (Nfld. provincial control database) ver. 96.1 Other standard Microsoft software

1 HP DesignJet 755 CM Plotter. 1 Altec Digitizing Tablet/Cursor, c/w PC controller.

Canadian Hydrographic Service Atlantic 22 Final Field Report 2000 Labrador Surveys LABRADOR SEAFLOOR 3D IMAGE GALLERY

EM 3000 data (high density) mixed with EM100 data (low density)

High density shoal areas beside deep Deep basin beside an island. channel.

Canadian Hydrographic Service Atlantic 23 Final Field Report 2000 Labrador Surveys Shoal of 4.5m depth 180m from an 80m Shoal area approaching the coast. deep area.

Natural channel between shoal areas. Narrow deep channel between two islands.

Canadian Hydrographic Service Atlantic 24 Final Field Report 2000 Labrador Surveys DIAGRAMS

Canadian Hydrographic Service Atlantic 25 Final Field Report 2000 Labrador Surveys 71 5 a DIAGRAM 1 • N CHARTS COVERAGE a: it) 5 70 ,‹ OF SURVEYED AREAS CD O 0 (c), ai o o cz) • ci) • rt, NE 4702 CIEL C. 0_ O a) CORBET ISLAND TO SHIP HARBOUR HEAD SCALE 1:75 000 < 0 CD C (1) arT 7

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Canadian Hydrographic Service newfoundland Final Field Report 2000 Labrador Surveys 28 CHART 5033 DIAGRAM 4 HAWKE BAY AND/ET DEER PASS (SQUASHO RUN)

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SOUNDING COVERAGE MULTIBEAM EM3000 MULTIBEAM EM 100 OM SINGLE BEAM KNUDSEN 320

Canadian Hydrographic Service newfoundland Final Field Report 2000 Labrador Surveys 30 710 5 o DIAGRAM 6 cp CHART 5033 c-9

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