In Britain, it means diddly. It means you're a male, presumably respectable. If you have no other title, then the overly-British will put esq. after your name on an envelope, etc. In America, I believe it's sometimes used after a lawyer's surname. However, I don't see it used much by U.S. lawyers.
Davit systems are most often used to lower an emergency lifeboat to the embarkation level to be boarded. Davits can also be used as man-overboard safety devices to retrieve personnel from the water. The lifeboat davit has falls (now made of wire, historically of manila rope) that are used to lower the lifeboat into the water.
1 Centerboard: This is a (usually fibreglass) plate that pivots from the bottom of the keel in some boats and is used to balance the boat when under sail. 2  Cleat: Cleats are what lines (or ropes) get fastened to when they need to be kept tight.  Halyard: Lines that raise or lower the sails.