noun
boatswain
BOH-sun/ˈbəʊsn/
A ship's officer who supervises the deck crew and equipment.
The boatswain directs the deck crew as the ship prepares to sail.

Etymology
The pieces suggest a boat's attendant. The compound came to name a ship's officer, whose responsibilities include equipment and directing the crew's work.
In context
The boatswain gave the signal to weigh anchor, and leaping upon the middle of the gangway began to lay on to the shoulders of the crew …
More examples
- The captain asks the boatswain to inspect the rigging.
- Two boatswains discuss the repairs needed on deck.
- The boatswain's call brings the crew together.
Forms
boatswain · boatswains
Similar words
- bosun
- An alternative spelling reflecting the usual nautical pronunciation.
- deck officer
- A broader role without the boatswain's specific crew duties.