The boatswain was the warrant officer responsible for the rigging and the sails on the ship.  He was also for the anchors, boats and booms.  The sail maker and rope maker served under the boatswain.

Here is a example of a Boatswains warrant for the sloop Cygnet.  This one was issued by the commanding admiral in Jamaica, but usually they were issued by the Navy Board.

The requirement for being a Boatswain was to be literate, and one year as a petty officer.  They usually came from the rank and file, rising from seamen status.

His duties required him to inspect the rigging everyday, looking for any part that might be frayed or chaffed.  He was also responsible for making sure all boats, anchors and booms are secure.  He was to be on deck "very frequently" during the day and anytime all hands were required.

The Boatswain was also the motivator, it was his job and his mates (assistants) to see that the seamen did their jobs quickly and efficiently without noise or confusion.

Their pay was the same as a gunners, ranging from £4.16.0 to £3.1.0/month depending on the size of the ship.