Marlin Spike said:
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:yellow: Ever had a question for the CBM? Feel free to ask.
Boatswain
The term boatswain is the oldest title in the sea service.
It is derived from the Old English batswegen or batsuen (boat's swain or husband).
In Saxon times the boatswain was in command. In medieval England, he was the officer who made the ship go, having charge of the masts, yards and sails, and was second only to the master. Nathaniel Boteler in his Dialogues, in the reign of King Charles I, showed the wide responsibilities of the boatswain in the early seventeenth century. He had charge of all ropes, anchors, sails, flags, colours, and care of the long-boat. He called up the watches to their duty, kept the sailors "in peace, and order one with another," and he saw to it that all offenders were punctually punished (boatswain's mates had to weild the cat-o'-nine tails), "either at the Capstan, or by being put in the bilboes, or with ducking at the main yard arm."
It is readily seen that through the centuries the boatswain has had the duties not only of command, but those associated with the coxswain and the late master-at-arms. But through it all the boatswain has remained to this day the seaman specialist, particularly in terms of equipment related to seamanship.
In HMC ships today, the boatswain is usually a master or chief warrant officer, looks after small arms, anchors and cables, hawsers and fenders, paints, life rafts and demolitions, as well as parade and small arms training.
Taken from the "Customs and Traditions of the Canadian Armed Forces (1980), Chapter 5: Words and Expressions"