Survey number: AK05 (Pat Hill number)
Name: Gulf of Alaska
Date flown: April-May 1970
Company: U.S. Naval Oceanographic Office
Flight specs: 1/2 to 4 mile flightline spacing, direction mostly E-W,
              survey altitude 900 ft above sea level.
Instrument: ?

Digitized by: DIGIMAP (Esther Castellanos, December 1996)
Map scale: approx. 1:1,000,000

Datum: total field (no IGRF removed)

Data format: Ascii format, XYZ records 
             Longitude (degrees), Latitude (degrees), Total Field (nT)
             written with FORTRAN format: (f10.5,x,f10.5,x,f8.1)

Background: These data were digitized under the direction of Rick Saltus 
            (saltus@usgs.gov) as part of the USGS project to merge the best 
            available aeromagnetic data into a consistent grid for the state 
            of Alaska.