Electronic control systems used on hydrographic surveys
Gilbert R. Fish · Journal of Geophysical Research Atmospheres · 1960
During the years 1957 and 1958 I had command of the U.S. Coast and Geodetic Survey ship Hydrographer while it was engaged on a survey of Georges Bank, which lies about 100 miles east of Cape Cod on the Massachusetts coast. (See Fig. 1.) This was a very interesting survey in that three electronic control systems were used to measure distance and furnish position control for the sounding lines. The principal system used was Raydist, and all the sounding lines run by the ship on the Bank were controlled by this system. In some of the deeper water around the edges of the Bank the electronic position indicator was used to control the sounding lines; and in the shoal areas on the Bank, which were too shallow for the ship, Shoran was used to control the position of the sounding launch.