g177eg.m77t and g177eg.h77t: MGD77T data and header files for single-beam bathymetry data for field activity G-1-77-EG in Yakutat Bay, Eastern Gulf of Alaska from 04/27/1977 to 05/22/1977

Single-beam bathymetry data along with dead reckoning navigation data was collected as part of the U.S. Geological Survey cruise G-1-77-EG. The cruise was conducted...作为美国地质调查局（U.S. Geological Survey）G-1-77-EG航次的组成部分，本次科考采集了单波束测深数据（single-beam bathymetry data）与航位推算导航数据（dead reckoning navigation data）。该航次执行于……