Crow's nest
The boat Ribica is at the Docks on Counterfeit island. There is a torn pocture piece on the top of the mast.
The boat Ribica is at the Docks left of Main Street. There is a picture piece at the top of the mast.
To ease the raising of sails, a pulley is attached to the top of the mast.
Yes
It's the triangular bit on top that you sit on.
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...
One at the left (on top of the boat's mast) and one on the right (the sand beach past the tunnel exit.
One is on top of the mast of the fishing boat. The other is at the lower right along the beach.
Mast head is English. It's the top of a mast.
the lookout who was stationed at the top of the mast
Stays and shrouds are mast supports. Shrouds support the mast to the sides of a boat while and a stay supports the mast in a fore and aft direction. More specifically, a forestay attaches to the mast near the top and runs to the bow. A headstay is a forestay, but is usually the highest forestay and runs furthest forward attaching to the bow or bowsprit.
as far as holding "up" ... the mast is usually stepped (attached) to the deck or keel on a sailboat. this supports the gravity downward load. to keep it from toppling over in the slightest breeze, there are wire rope stays connected at various points. in a masthead sloop there is a headstay and backstay connecting the front and back of the boat to the top of the mast. there are also shrouds (left and right) wire rope rigging (usually) that hold the mast up from the left and right. there can also be attachments at the midheight of the mast for fore and aft shrouds as well.