Sounding technique used by Sir James Clark Ross in obtaining first moderndeep sea sounding on January 3, 1840 at Latitude 27 26 S and Longitude 17 29 W. The observed depth was 2,425 fathoms. On January 22, 1968, the ESSA ShipDISCOVERER sounded at th
4/4/2019 1:14:57 PM
Subject: Historical Ships
Subject: Sounding