Open-File Report 00-321: Activities and Preliminary Results of Nearshore Benthic Habitat Mapping in Southern California, 1998

Activities and Preliminary Results of Nearshore Benthic Habitat Mapping in Southern California, 1998

Navigation Systems

The 1998 survey was navigated with a Leica Differential Global Positioning System (DGPS) which provided a ship position with accuracy of 1-5 m in DGPS mode. At times during the cruise differential signal was interrupted. In non-differential mode, the receiver provided a position with 30-50 m accuracy. A KVH Industries Inc. azimuth digital gyro-compass provided ship headings with 0.5 degree accuracy. Navigation data were recorded using Yo-Nav version 1.19 (Gann, 1992). The sidescan fish was towed approximately 30 m above the seafloor. The distance of the fish behind the ship was not known during this survey and must be estimated when the data are processed in order to produce the sidescan image mosaics.

Top of Page

For more information, contact the PCMSC team.

Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Suggested citation:

Cochrane, Guy R., and Lafferty, Kevin D., 2000, Activities and Preliminary Results of Nearshore Benthic Habitat Mapping in Southern California, 1998: U.S. Geological Survey Open-File Report 00-321, https://pubs.usgs.gov/of/2000/0321/.

U.S. Department of the Interior
SALLY JEWELL, Secretary

U.S. Geological Survey
Suzette M. Kimball, Acting Director