Survey Identifier: LY70E
Format Acronym: MGD77
Data Center File Number: 09260005
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): VOST,P.R.
Survey Departure Date (yyyymmdd): 19701003
Port of Departure: NASSAU
Survey Arrival Date (yyyymmdd): 19701018
Port of Arrival: SAN JUAN
Navigation Instrumentation: SATELLITE
Geodetic Datum/Position: SATELLITE/DEAD RECONKING
Bathymetry Instrumentation: 3.5 ON 12 KHZ FATHOMETER
Additional Forms of Bathymetric Data: ANALOG
Magnetics Instrumentation: PROTON PRECESSION
Additional Forms of Magnetics Data: ANALOG
Topmost Latitude of Survey: +29
Bottommost Latitude: +21
Leftmost Longitude: -077
Rightmost Longitude: -059
General Digitizing Rate of Bathymetry: 51
General Sampling Rate of Bathymetry: 1 SEC SWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 53
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: 4122
Min/Max Data Record:
Date: 1970 10 03
Latitude: +21.67300
Longitude: -76.28510
Bathymetry, 2- Way Traveltime: 051527
Bathymetry, Corrected Depth: 3884.0
Magnetics Total Field, 1st Sensor: 454200
Magnetics Residual Field: -07831
Min/Max Data Record:
Date: 1970 10 18
Latitude: +28.49380
Longitude: -59.95090
Bathymetry, 2- Way Traveltime: 079252
Bathymetry, Corrected Depth: 6023.0
Magnetics Total Field, 1st Sensor: 492550
Magnetics Residual Field: +03068