f991cp.m77t and f991cp.h77t: MGD77T data and header files for single-beam bathymetry data for field activity F-9-91-CP in Central Pacific from 09/24/1991 to 09/25/1991

Single-beam bathymetry data along with GPS navigation data was collected as part of the U.S. Geological Survey cruise F-9-91-CP. The cruise was conducted in the...本次美国地质调查局（U.S. Geological Survey）F-9-91-CP航次同步采集了单波束测深数据与GPS导航数据。该航次的作业区域为……