Survey Identifier: LY73A


Format Acronym: MGD77
Data Center File Number: 09260017
Parameters Surveyed Code: 55000
File Creation Date (yyyymmdd): 19810609
Source Institution: NAVAL OCEAN RESEARCH AND DEV. ACTIVITY
Country: USA
Platform Name: LYNCH
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): S.J.DELEYIANNIS
Survey Departure Date (yyyymmdd): 19730512
Port of Departure: WASHINGTON D.C.
Survey Arrival Date (yyyymmdd): 19730521
Port of Arrival: NORFOLK VA.
Navigation Instrumentation: SATALLITE
Geodetic Datum/Position: SATELLITE/DEAD RECONKING
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: +39
Bottommost Latitude: +32
Leftmost Longitude: -077
Rightmost Longitude: -068
General Digitizing Rate of Bathymetry: 40
General Sampling Rate of Bathymetry: 1 SEC SWEEP
Assumed Sound Velocity: 14630
Bathymetric Datum Code: 00
General Digitizing Rate of Magnetics: 14
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: 7090

Min/Max Data Record:
Date: 1973 05 12
Latitude: +32.32680
Longitude: -76.04710
Bathymetry, 2- Way Traveltime: 000099
Bathymetry, Corrected Depth: 7.0
Magnetics Total Field, 1st Sensor: 513770
Magnetics Residual Field: +13769

Min/Max Data Record:
Date: 1973 05 21
Latitude: +38.26260
Longitude: -68.91800
Bathymetry, 2- Way Traveltime: 071275
Bathymetry, Corrected Depth: 5407.0
Magnetics Total Field, 1st Sensor: 547030
Magnetics Residual Field: +47029