Survey Identifier: V1409
Format Acronym: MGD77
Data Center File Number: 01030348
Parameters Surveyed Code: 53111
File Creation Date (yyyymmdd): 19921214
Source Institution: Lamont-Doherty Geological Observatory
Country: United States
Platform Name: R/V vema
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): H.C. Kohler, T. Takahashi
Project: v1409
Survey Departure Date (yyyymmdd): 19580314
Port of Departure: Saunders Is., So. Sandwich Is.
Survey Arrival Date (yyyymmdd): 19580407
Port of Arrival: Cape Town, South Africa
Navigation Instrumentation: stars
Geodetic Datum/Position: dr and mileage log
Bathymetry Instrumentation: 12 khz PDR
Additional Forms of Bathymetric Data: paper records
Topmost Latitude of Survey: -33
Bottommost Latitude: -58
Leftmost Longitude: -027
Rightmost Longitude: +019
General Digitizing Rate of Bathymetry: 50
General Sampling Rate of Bathymetry: continuous
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 0
Interpolation Scheme: 5 min intervals when data spacing less than 30 min
Additional Documentation: Bathymetry points were interpolated at 5 minute intervals when data spacing, was less than 30 minutes. When data spacing was 30 minutes or more, no, interpolation was done. Actual and interpolated values are included.
Number of Data Records: 4837
Min/Max Data Record:
Date: 1958 03 14
Latitude: -57.86666
Longitude: -26.31666
Bathymetry, 2- Way Traveltime: 000551
Bathymetry, Corrected Depth: 41.0
Min/Max Data Record:
Date: 1958 04 07
Latitude: -33.75833
Longitude: +18.39999
Bathymetry, 2- Way Traveltime: 106201
Bathymetry, Corrected Depth: 8056.0