Aft, and adjacent to the mainmast are four additional, enclosed berths.
The trestletree attached the mainmast to the topmast of schooners.
The roof is surmounted by a modern radar on a short mast and a short mainmast with lights mounted atop.
The mainmast was clipped off during this engagement.
The foremast was gone, but the mainmast was standing.
The string of flags strung from the top of the mainmast was the pride of the crew.
Her spars are completed and the builders promise to have her mainmast stepped within an hour after the boat's taking the water.
Fore and mainmast gone, and jib-boom gone, with their sails and rigging.
British Dictionary definitions for mainmast
mainmast
/ˈmeɪnˌmɑːst/
noun
1.
(nautical) the chief mast of a sailing vessel with two or more masts, being the foremast of a yawl, ketch, or dandy and the second mast from the bow of most others