Survey Identifier: V1412

Format Acronym: MGD77
Data Center File Number: 01030351
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): J. Nafe
Project: v1412
Survey Departure Date (yyyymmdd): 19580511
Port of Departure: Port Louis, Mauritius
Survey Arrival Date (yyyymmdd): 19580607
Port of Arrival: Aden, Aden
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: +15
Bottommost Latitude: -21
Leftmost Longitude: +045
Rightmost Longitude: +071
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: 5847

Min/Max Data Record:
Date: 1958 05 11
Latitude: -20.14999
Longitude: +45.68333
Bathymetry, 2- Way Traveltime: 000251
Bathymetry, Corrected Depth: 19.0

Min/Max Data Record:
Date: 1958 06 06
Latitude: +14.35000
Longitude: +70.26666
Bathymetry, 2- Way Traveltime: 084251
Bathymetry, Corrected Depth: 6388.0