A mast.
The vertical post is the mast, and the horizontal post is the spar. Both are required.
Mast .
The "ropes" that raise or lower the sails are called HALYARDS and the "ropes" that control the sails are called SHEETS. Halyards are the lines (ropes) that raise sails. Downhauls lower them (note...
the boom
I believe it is called a "spar".
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