midwatch

[mid-woch]

noun Nautical.

Origin of midwatch

First recorded in 1525–35; mid- + watch

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

It was just after three bells in the midwatch when I heard a yell from my lookout.
Harper's Round Table, July 23, 1895
Various
I did not turn in till after you had gone on deck to take the midwatch.
On The Blockade
Oliver Optic