Survey Identifier: LY71F
Format Acronym: MGD77
Data Center File Number: 09260011
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): 19710821
Port of Departure: ST JOHNS
Survey Arrival Date (yyyymmdd): 19710901
Port of Arrival: NORFOLK
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: +48
Bottommost Latitude: +35
Leftmost Longitude: -075
Rightmost Longitude: -050
General Digitizing Rate of Bathymetry: 114
General Sampling Rate of Bathymetry: 1 SEC SWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 106
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: 2035
Min/Max Data Record:
Date: 1971 08 21
Latitude: +35.57180
Longitude: -74.78780
Bathymetry, 2- Way Traveltime: 000775
Bathymetry, Corrected Depth: 58.0
Magnetics Total Field, 1st Sensor: 500600
Magnetics Residual Field: -08293
Min/Max Data Record:
Date: 1971 09 01
Latitude: +47.29250
Longitude: -50.02010
Bathymetry, 2- Way Traveltime: 071402
Bathymetry, Corrected Depth: 5412.0
Magnetics Total Field, 1st Sensor: 544680
Magnetics Residual Field: +05842