boatswain; bosun
A nautical title for the officer in charge of equipment and the crew on a ship. Cross-referenced with 運用 (sense 2), which relates to ship operations.
See also: 運用
The boatswain is responsible for overseeing the ship's equipment and crew.
Compound of 運用 (うんよう, 'ship operations') and 長 (ちょう, 'chief' or 'head'), literally 'chief of operations'.