Sorry got to bite! Surely,if you are aground and drying out (falling the 'wrong way') you would stay awake, inflate dinghy, advise CG NOT go to bed??
Is the engineer being tooooo practical???
Humm my experience is that East Coast boaters are quite used to going aground on a falling tide , ofter taking a Nap is a usuall way of dealing with it , why watch the Water just catch up on some sleep and rest : Some of them Sandbanks etc can have pretty steep to sides to them , not apparent when freshly run on top of them ; So any stranded Craft coud easily just slip stern first , backwards , into deeper waters , especially if wind was in wrong direction ?
I do find fault with the Boats Pumps running off /from the Engine , which I think is troublesome , and unessary >