414000 E 416000 E 418000 E 420000 E 422000 E 424000 E 426000 E 428000 E 430000 E 432000 E 434000 E LEGEND 150 Bathymetric contours shown at 20 metre intervals Land area Colour Banding Bathymetry Metres 100 200 300 400 500 600 700 800 900 420000 421000 422000 423000 424000 425000 426000 427000 428000 429000 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 Slope angle (degrees) 80 75 70 65 60 NOTES 55 Observed soundings have been reduced to Chart Datum 50 defined as 0.7859 m below LAT, 45 1.985 m below mean sea level (MSL 1993-1994), 40 and 4.0123 m below the fixed height of Benchmark 22 on Funafuti, Tuvalu 35 30 25 Date of Survey 08/09 to 24/10/2004 20 Acquisition system Reson SeaBat 8160 multibeam echosounder Collection software Hypack 4.3 15 Processing software Hypack 4.3A 10 Data presentation Surfer 8.03 5 Survey vessel M.V. Turagalevu 0 Backdrop image is a 2003 IKONOS satellite image rectified using differential GPS ground control points. NOT TO BE USED FOR NAVIGATION LOCATION 0 m 4° S 500 m 1000 m 9298000 9299000 9300000 9301000 9302000 9303000 9304000 9305000 9306000 9307000 9308000420000 9309000 9310000 9311000 9312000 9313000 421000 422000 423000 424000 425000 426000 427000 428000 429000 9298000 9299000 9300000 9301000 9302000 9303000 9304000 9305000 9306000 9307000 9308000 9309000 9310000 9311000 9312000 9313000 Nanumea 6° S 1500 m INSET Nanumanga Niutao Gradient slope angle map generated from 20 m 2000 m gridded multibeam bathymetry. Nui Red indicates higher slope angles. Vaitupu 2500 m 8° S Blue indicates near horizontal seafloor. Nukufetau 3000 m e altimetry and ship depth soundings, Funafuti H. F., and D. T. Sandwell, 1997. 3500 m Nukulaelae 4000 m 10° S 4500 m Niulakita 5000 m 420000 421000 422000 423000 424000 425000 426000 427000 428000 429000 12° S 5500 m 6000 m 174° E 176° E 178° E 180° 178° W Predicted bathymetry from Smith, W. Global seafloor topography from satellit Science, v. 277, 1957-1962. 6500 m GEODETIC INFORMATION Geodetic datum WGS84 Ellipsoid WGS84 Projection UTM Zone 60 South Horizontal positioning Stand alone GPS SCALE Scale 1 : 25 000 0 500 1000 1500 2000 Metres A0 Original PROJECT TITLE SOUTH PACIFIC APPLIED GEOSCIENCE COMMISSION INSET Private Mail Bag, GPO, Suva, Fiji Islands Three-dimensional perspective image looking west www.sopac.org SOPAC/EU Project: Reducing Vulnerability of Pacific ACP States 9298000 9299000 9300000 9301000 9302000 9303000 9304000 9305000 9306000 9307000 9308000420000 9309000 9310000 9311000 9312000 9313000 421000 422000 423000 424000 425000 426000 427000 428000 429000 9298000 9299000 9300000 9301000 9302000 9303000 9304000 9305000 9306000 9307000 9308000 9309000 9310000 9311000 9312000 9313000 DRAWING TITLE INSET Shaded relief bathymetry map. Sun illumination angle with an azimuth of 315° and a 45° inclination. NANUMANGA TUVALU INSET BATHYMETRY Three-dimensional perspective image looking east Chart no. 3, Drawing no. ER0050.3 Drawn by: Jens Kruger, Report Reference: ER0050 414000 E 416000 E 418000 E 420000 E 422000 E 424000 E 426000 E 428000 E 430000 E 432000 E 434000 E 9297000 N9297000 N 9299000 N 9301000 N 9303000 N 9305000 N 9307000 N 9309000 N 9311000 N 9313000 N9297000 N 9299000 N 9301000 N 9303000 N 9305000 N 9307000 N 9309000 N 9311000 N 9313000.