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.
Take a look at your Polaris Pool Cleaner and locate a sponge looking item attached to the very end of the cleaner on the tail. This is called the Sweep Hose Scrubber. Itâs is there to distribute water expelled from the cleaner to clear out and scrub debris to clean every inch of your pool.