Survey Identifier: V2112
Format Acronym: MGD77
Data Center File Number: 01030075
Parameters Surveyed Code: 55533
File Creation Date (yyyymmdd): 19890703
Source Institution: LAMONT-DOHERTY GEOLOGICAL OBSERVATORY
Country: U.S.A.
Platform Name: VEMA
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): DR. D. HAYES
Project: CRUISE 21, LEG 12
Survey Departure Date (yyyymmdd): 19650916
Port of Departure: DUTCH HARBOR, ALASKA
Survey Arrival Date (yyyymmdd): 19650930
Port of Arrival: HONOLULU, HAWAII
Navigation Instrumentation: SEXTANT
Geodetic Datum/Position: DEAD RECKONING
Bathymetry Instrumentation: (SEE ADD. DOC./18)
Additional Forms of Bathymetric Data: ANALOG RECORDS
Magnetics Instrumentation: L-DGO MFG PROTON-PRECESSION
Additional Forms of Magnetics Data: ANALOG RECORDS
Gravity Instrumentation: GRAF-ASKANIA GSS2-12
Additional Forms of Gravity Data: ANALOG RECORDS
Seismic Instrumentation: L-DGO 25CU.IN.AIRGUN, EEL,DRUM RECORDER
Formats of Seismic Data: TWO, 2-CHANNEL SHEET RECORDS
Topmost Latitude of Survey: +54
Bottommost Latitude: +20
Leftmost Longitude: -166
Rightmost Longitude: -156
General Digitizing Rate of Bathymetry: 060
General Sampling Rate of Bathymetry: ONE SECOND
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
Interpolation Scheme: NONE
General Digitizing Rate of Magnetics: 060
General Sampling Rate of Magnetics: 00
Reference Field Code: 03
Reference Field: IGRF-65
Method of Applying Residual Field: LINEAR INTERPOLATION BETWEEN NAV. PTS.
General Digitizing Rate of Gravity: 100
General Sampling Rate of Gravity: 00
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNATIONAL1930
Reference System Code: 2
Reference System: POTSDAM SYSTEM
Additional Documentation: 06 - 12 KHZ, WIDE BEAM (60 DEG), 1 SECOND SWEEP
Number of Data Records: 1695
Min/Max Data Record:
Date: 1965 09 16
Latitude: +20.79210
Longitude: -165.94170
Bathymetry, 2- Way Traveltime: 001075
Bathymetry, Corrected Depth: 81.0
Magnetics Total Field, 1st Sensor: 358590
Magnetics Residual Field: -06870
Free-Air Anomaly: -1849
Min/Max Data Record:
Date: 1965 09 30
Latitude: +53.73330
Longitude: -156.95830
Bathymetry, 2- Way Traveltime: 093825
Bathymetry, Corrected Depth: 7118.0
Magnetics Total Field, 1st Sensor: 506030
Magnetics Residual Field: +06690
Free-Air Anomaly: +1429