Survey Identifier: A118L21

Format Acronym: MGD77
Data Center File Number: 17080014
Parameters Surveyed Code: 51111
File Creation Date (yyyymmdd): 19900315
Country: USA
Platform Name: R/V ATLANTIS II
Platform Type Code: 1
Platform Type: SHIP
Chief Scientist(s): STEVE HAMMOND
Project: A118L21
Funding: NOAA
Survey Departure Date (yyyymmdd): 19870914
Port of Departure: NEWPORT, OREGON
Survey Arrival Date (yyyymmdd): 19871005
Port of Arrival: NEWPORT, OREGON
Navigation Instrumentation: LORAN-C, GPS, TRANSIT SATELLITE
Geodetic Datum/Position: PRIM-LORAN
Bathymetry Instrumentation: SEA BEAM vertical beam
Additional Forms of Bathymetric Data: ANALOG
Topmost Latitude of Survey: +47
Bottommost Latitude: +44
Leftmost Longitude: -131
Rightmost Longitude: -124
General Digitizing Rate of Bathymetry: 012
General Sampling Rate of Bathymetry: VAR-W-DEPTH
Assumed Sound Velocity: 15000
Interpolation Scheme: 1 MINUTE AVERAGES
Additional Documentation: Other data reported to have been collected on this cruise were Alvin dives, Sea Beam backscatter, and dredging. Marginal quality Loran data used to match NOAA (loran) base maps.
Number of Data Records: 12612

Min/Max Data Record:
Date: 1987 09 14
Latitude: +44.29992
Longitude: -130.90592
Bathymetry, 2- Way Traveltime: 000707
Bathymetry, Corrected Depth: 53.0

Min/Max Data Record:
Date: 1987 10 05
Latitude: +46.40505
Longitude: -124.39225
Bathymetry, 2- Way Traveltime: 041787
Bathymetry, Corrected Depth: 3111.0