Sir James Clark Ross

Definition: Sir James Clark Ross

Sir James Clark Ross

Noun

1. British explorer of the Arctic and Antarctic; located the north magnetic pole in 1831; discovered the Ross Sea in Antarctica; nephew of Sir John Ross (1800-1862).

Source: WordNet 1.7.1 Copyright © 2001 by Princeton University. All rights reserved.
 

Synonyms: Sir James Clark Ross

Sounding technique used by Sir James Clark Ross in obtaining first modern deep 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 Ship DISCOVERER sounded at the same location with a modern echo-sounder and measured 2312 fathoms, less than a 5 per cent error for Ross's observation. Credit: Sailing for Science - the NOAA Fleet Then and Now.

Source: pictures compiled by the editor from various references; see picture credits.

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