Felix Riesenberg, The Men on Deck: Master, Mates and Crew…
“ The Chief Mate should see that all necessary assistance is given to the officer of the watch—when he stands days duty—in matters {102} of taking soundings, turning ventilators, setting and taking in awnings, heaving the deep sea lead, etc. Where the Chief Mate stands his watch, the watch officer on duty during a day watch is technically in full charge, and gives his orders direct. ”
