Survey Identifier: LY71E
Format Acronym: MGD77
Data Center File Number: 09260010
Parameters Surveyed Code: 55003
File Creation Date (yyyymmdd): 19810604
Source Institution: NAVAL OCEAN RESEARCH AND DEV. ACTIVITY
Country: U.S.A.
Platform Name: USNS LYNCH
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): JOHNSON,G.L.
Survey Departure Date (yyyymmdd): 19710729
Port of Departure: ST JOHNS
Survey Arrival Date (yyyymmdd): 19710818
Port of Arrival: ST JOHNS
Navigation Instrumentation: SATELLITE
Geodetic Datum/Position: SATELLITE/DEAD RECONKING
Bathymetry Instrumentation: 3.5 ON 12KHZ FATHOMETER
Additional Forms of Bathymetric Data: ANALOG
Magnetics Instrumentation: PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOG
Topmost Latitude of Survey: +66
Bottommost Latitude: +49
Leftmost Longitude: -057
Rightmost Longitude: -041
General Digitizing Rate of Bathymetry: 100
General Sampling Rate of Bathymetry: 1 SEC SWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 101
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: 3991
Min/Max Data Record:
Date: 1971 07 29
Latitude: +49.24880
Longitude: -56.72010
Bathymetry, 2- Way Traveltime: 000500
Bathymetry, Corrected Depth: 38.0
Magnetics Total Field, 1st Sensor: 527370
Magnetics Residual Field: -09132
Min/Max Data Record:
Date: 1971 08 18
Latitude: +65.91490
Longitude: -41.53540
Bathymetry, 2- Way Traveltime: 054100
Bathymetry, Corrected Depth: 4051.0
Magnetics Total Field, 1st Sensor: 569990
Magnetics Residual Field: +59209