Survey Identifier: BBAY212
Format Acronym: MGD77
Data Center File Number: 03100001
Parameters Surveyed Code: 55531
File Creation Date (yyyymmdd): 19800207
Source Institution: NOAA/NOS
Country: UNITED STATES
Platform Name: RAINIER
Platform Type Code: 1
Platform Type: SHIP
Project: OPR 495-BRISTOL BAY
Funding: NOAA
Survey Departure Date (yyyymmdd): 19700416
Port of Departure: BRISTOL BAY,USA
Survey Arrival Date (yyyymmdd): 19700613
Port of Arrival: BRISTOL BAY, USA
Navigation Instrumentation: LORAN-C/VISUAL AND RADAR BEARINGS
Bathymetry Instrumentation: RAYTHEON(DE-723) FOR <270 M/ SEE AD DOC
Magnetics Instrumentation: VARIAN(V-4937)
Gravity Instrumentation: LACOSTE-ROMBERG S.T. GRAVITY METER
Seismic Instrumentation: SEE AD DOC 19-20
Topmost Latitude of Survey: +59
Bottommost Latitude: +54
Leftmost Longitude: -169
Rightmost Longitude: -161
General Digitizing Rate of Bathymetry: 18
General Digitizing Rate of Magnetics: 16
Magnetic Sensor Tow Distance: 245
Reference Field Code: 03
Reference Field: IGRF-65
General Digitizing Rate of Gravity: 16
Theoretical Gravity Formula Code: 2
Theoretical Gravity Formula: INTERNAT'L 1930
Corrections Applied: EOTVOS
Additional Documentation: UQN-PDR MARK XVA SOUNDING EQUIPTMENT FOR > 270 M, BOLT PAR 600B AIRGUN WITH CHAMBER VOLUME OF 655 ML/TELEDYNE HYDROPHONE, DETECTING UNIT/RAYTHEON PSR-1910B RECORDER, *** NEW DIGITAL VERSION CONTAINS CORRECT 2-WAY TRAVEL TIME AND FREE-AIR ***
Number of Data Records: 46195
Min/Max Data Record:
Date: 1970 04 16
Latitude: +54.40200
Longitude: -168.08800
Bathymetry, 2- Way Traveltime: 000191
Bathymetry, Corrected Depth: 14.0
Magnetics Total Field, 1st Sensor: 502360
Magnetics Residual Field: -09980
Observed Gravity: 9809840
Free-Air Anomaly: -7750
Min/Max Data Record:
Date: 1970 06 13
Latitude: +59.00000
Longitude: -161.96200
Bathymetry, 2- Way Traveltime: 022502
Bathymetry, Corrected Depth: 1660.0
Magnetics Total Field, 1st Sensor: 599800
Magnetics Residual Field: +87670
Observed Gravity: 9827110
Free-Air Anomaly: +4700