There is a plastic boot with a rubber piece that surrounds the pipe for this. If it's an existing installation you won't be able to do this unless you have utility power disconnected. However, you can get some flashing and tar and seal the leak by installing the flashing under the shingles with liberal amounts of tar, and sealing the upper part of the flashing to the mast with tar as well. If you don't know how to install flashing, a simple Google search or talk with someone at Home Depot should get you started.
The stays are usually wire, connecting the mast (near to the top) to the deck (near the gunwales). Its purpose is to prevent the mast from being ripped out of the deck by the forces of the wind against the sail...
Mast head is English. It's the top of a mast.
the lookout who was stationed at the top of the mast
The main mast is the tallest of all masts on the ship. If all masts are the same height, then the one with the top navigationlight is the main mast. If there is only one mast, then that would be the main mast.
masthead
The mizzen is the third mast on a ship, or the mast immediately aft of the mainmast. The top sail on that mizzenmast would the mizzen-top. Your local slang may vary.
23.2 ft.
it is a nut that holds the main rotor to the mast of some helicopters. The Jesus Nut is the large nut on the top of the mast that holds the entire rotor blades and rotor mechanism to the mast. Bascially, it holds the weight of the aircraft by the top of the mast and if it should fail, then all you can do is say "Jesus!".
The flag must first be hoisted to the top of the mast momentarily, and then it is lowered to the half mast position and secured.
It is called a rain bonnet.
The extended height when forks are at top.
Crow's nest