Survey Identifier: TG78-2
Format Acronym: MGD77
Data Center File Number: 08050015
Parameters Surveyed Code: 51111
File Creation Date (yyyymmdd): 19821121
Source Institution: HAWAII INST. GEOPHYSICS FOR CCOPSOPAC
Country: U.S.A.
Platform Name: R/V MACHIAS
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): JAMES V. EADE
Project: CCOP/SOPAC-UN/RAS/72/122 PROJECT, CRUISE TG-78-2.
Funding: UNDP
Survey Departure Date (yyyymmdd): 19781028
Port of Departure: SUVA,FIJI
Survey Arrival Date (yyyymmdd): 19781101
Port of Arrival: NUKU'ALOFA,TONGA
Navigation Instrumentation: SATNAV MAGNAVOX 1112,RADAR,SEXTANT
Geodetic Datum/Position: 1-SATNAV,2-RADAR,3-SEXTANT
Bathymetry Instrumentation: (SEE ADD.DOC. 18)
Additional Forms of Bathymetric Data: ANALOG RECORDS,MICROFILM.
Topmost Latitude of Survey: -18
Bottommost Latitude: -22
Leftmost Longitude: +178
Rightmost Longitude: -175
General Digitizing Rate of Bathymetry: 64
General Sampling Rate of Bathymetry: 01SEC/SWEEP
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: NONE.(PICKED PEAKS/TROUGHS OR 15MIN INTERVALS IF SMOOTH)
Additional Documentation: 06 7 KHZ,36 DEGREE BEAM WIDTH, 01SEC/SWEEP. BATHYMETRY IN THE LAU GROUP, 06 (FIJI) ACCOMPANYING A SAMPLING PROGRAMME IN SEARCH OF PHOSPHORITES.
Number of Data Records: 954
Min/Max Data Record:
Date: 1978 10 28
Latitude: -21.00417
Longitude: -179.99967
Bathymetry, 2- Way Traveltime: 000400
Bathymetry, Corrected Depth: 30.0
Min/Max Data Record:
Date: 1978 11 01
Latitude: -18.18033
Longitude: +179.97847
Bathymetry, 2- Way Traveltime: 036240
Bathymetry, Corrected Depth: 2708.0