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.
Two gills remove the oxygen from the water, then the slits close and the water is released through a tube called the siphon.. Moving About: Octopuses use their mantle to swim. They tighten all the mantle muscles at once, squeezing a blast of water from the siphon, causing the octopus to launch forward.