Survey Identifier: LY70B
Format Acronym: MGD77
Data Center File Number: 09260002
Parameters Surveyed Code: 55003
File Creation Date (yyyymmdd): 19810609
Source Institution: NAVAL OCEAN RESEARCH AND DEVELOPMEN.ACT
Country: USA
Platform Name: USNS LYNCH
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): ESCOWITZ,E.
Survey Departure Date (yyyymmdd): 19700404
Port of Departure: SAN JUAN,P.R.
Survey Arrival Date (yyyymmdd): 19700416
Port of Arrival: BARBADOS
Navigation Instrumentation: SATELLITE
Geodetic Datum/Position: SATELLITE/DEAD RECKONING
Bathymetry Instrumentation: 3.5 OR 12 KHZ FATHOMETER
Additional Forms of Bathymetric Data: ANALOG
Magnetics Instrumentation: PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOG
Topmost Latitude of Survey: +21
Bottommost Latitude: +13
Leftmost Longitude: -066
Rightmost Longitude: -053
General Digitizing Rate of Bathymetry: 35
General Sampling Rate of Bathymetry: 1 SEC SWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 35
General Sampling Rate of Magnetics: 03
Magnetic Sensor Tow Distance: 1000
Reference Field Code: 03
Reference Field: IGRF-65
Method of Applying Residual Field: INTERPOLATION BETWEEN NAV POINTS
Number of Data Records: 5702
Min/Max Data Record:
Date: 1970 04 04
Latitude: +13.63420
Longitude: -65.91780
Bathymetry, 2- Way Traveltime: 013402
Bathymetry, Corrected Depth: 1006.0
Magnetics Total Field, 1st Sensor: 413850
Magnetics Residual Field: -04666
Min/Max Data Record:
Date: 1970 04 16
Latitude: +20.99840
Longitude: -53.05190
Bathymetry, 2- Way Traveltime: 099702
Bathymetry, Corrected Depth: 7633.0
Magnetics Total Field, 1st Sensor: 429130
Magnetics Residual Field: -00151