Survey Identifier: A118L20

Format Acronym: MGD77
Data Center File Number: 17080013
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): LAVERN KULM
Project: A118L20
Funding: NSF
Survey Departure Date (yyyymmdd): 19870828
Port of Departure: ASTORIA, OREGON
Survey Arrival Date (yyyymmdd): 19870910
Port of Arrival: NEWPORT, OREGON
Navigation Instrumentation: GPS, LORAN-C, TRANSIT SATELLITE
Geodetic Datum/Position: PRIM-LORAN
Bathymetry Instrumentation: SEA BEAM vertical beam
Additional Forms of Bathymetric Data: ANALOG
Topmost Latitude of Survey: +46
Bottommost Latitude: +44
Leftmost Longitude: -126
Rightmost Longitude: -124
General Digitizing Rate of Bathymetry: 018
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, coring, Deep Tow seismics, biological sampling. Navigation for the multibeam bathymetry was adjusted to match bathymetry in, the survey area.
Number of Data Records: 7664

Min/Max Data Record:
Date: 1987 08 29
Latitude: +44.51728
Longitude: -125.55187
Bathymetry, 2- Way Traveltime: 001907
Bathymetry, Corrected Depth: 143.0

Min/Max Data Record:
Date: 1987 09 10
Latitude: +45.87137
Longitude: -124.55443
Bathymetry, 2- Way Traveltime: 039107
Bathymetry, Corrected Depth: 2910.0