Survey Identifier: TG771
Format Acronym: MGD77
Data Center File Number: 08080001
Parameters Surveyed Code: 51111
File Creation Date (yyyymmdd): 19820908
Source Institution: HAWAII INST. GEOPHYSICS FOR CCOPSOPAC
Country: U.S.A.
Platform Name: R/V ACHERON
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): JIM V. EADE
Project: CCOP/SOPAC-UN/RAS/72/122. CRUISE TG-77-1.
Funding: UNDP
Survey Departure Date (yyyymmdd): 19770916
Port of Departure: NUKU'ALOFA,TONGA
Survey Arrival Date (yyyymmdd): 19771002
Port of Arrival: NUKU'ALOFA,TONGA
Navigation Instrumentation: RADAR,SEXTANT
Geodetic Datum/Position: 1-RADAR,2-SEXTANT
Bathymetry Instrumentation: (SEE ADD.DOC. 18)
Additional Forms of Bathymetric Data: ANALOG RECORDS,MICROFILM
Topmost Latitude of Survey: -15
Bottommost Latitude: -22
Leftmost Longitude: -176
Rightmost Longitude: -173
General Digitizing Rate of Bathymetry: 58
General Sampling Rate of Bathymetry: 01SEC/SWEEP
Assumed Sound Velocity: 15000
Bathymetric Datum Code: 00
Interpolation Scheme: NONE.(PICKED PEAKS/TROUGHS OR 15MIN.INTERVLS IF SMOOTH.)
Additional Documentation: 06 RAYTHEON PTR-106C-1,7KHZ,1SEC/SWEEP. BATHYMETRY ACCOMPANYING, 06 A SAMPLING PROGRAMME IN SEARCH OF METALLIFEROUS MUDS, 06 PHOSPHORITES AND PRECIOUS CORALS.
Number of Data Records: 4159
Min/Max Data Record:
Date: 1977 09 16
Latitude: -21.27333
Longitude: -175.92500
Bathymetry, 2- Way Traveltime: 000180
Bathymetry, Corrected Depth: 13.0
Min/Max Data Record:
Date: 1977 10 02
Latitude: -15.39667
Longitude: -173.40834
Bathymetry, 2- Way Traveltime: 029850
Bathymetry, Corrected Depth: 2230.0