12 ч 59 мин, 20 ноя 1963 г. - First Multibeam Sounding
Описание:
The first operational multibeam sounding system is installed on the USNS Compass Island. This system observes a number of soundings to the left and right of a ship’s head as well as vertically. This is important because it is the development of a relatively accurate map of the sea floor as the ship proceeds on a survey lineДобавлено на ленту времени:
Дата:
12 ч 59 мин, 20 ноя 1963 г.
Сейчас
~ 60 г назад
