Could you mean a figurehead? See
http://en.wikipedia.org/wiki/Figurehead_%28object%29
It's called a figure-head.
The front of a vessel be it a ship or boat, is the bow or stem. The back is the stern.
Bow ,
Mermaids don't even exist It is called a figure-head and it doesn't have to be a mermaid, can be pretty well almost anything.
The rear of the ship is called the "stern". The front is called the "bow". The rear direction in a ship is "aft". (head "aft" to get to the "stern").
The front of a ship is the Bow. The rear of a ship is the Stern. This is the same for small boats as well.
when she is 42 when she is 42
Because on the old sailing ships the wind blew from the back to the front. Sailors would go to the front of the ship, where the figurehead is, to do their business over the side, so that it and the smell were blown away from the rest of the ship. You would tell your mates you were going to the head and they all knew what you meant. The name has stuck ever since.
SS Californian was 15 miles in front of the RMS Titanic and it was the only ship that was close.
S.S. in front of the name of a ship stands for steamship.
Her Majesty's Australian Ship
Steam Ship.
It is called the figurehead.