Noun
watchkeeping (uncountable)
The duties of a watchkeeper, i.e. keeping a lookout.
After a few minutes, Graf Spee called Ajax on W/T, probably on the international watchkeeping frequency of 500 kHz, using both ships' pre-war call-signs, with the signal: "please pick up lifeboats of English steamer". Source: Internet
Beatty (1980), p. 15, 21 Beatty was promoted to midshipman on 15 May 1886 and assigned to assist Lieutenant Stanley Colville on watchkeeping duties: Colville was to play an important part in Beatty's future career. Source: Internet
On LPG and LNG tankers however, a cargo engineer works with the deck department during cargo operations, as well as being a watchkeeping engineer. Source: Internet