maintopsail

The Guerriere backed her maintopsail and waited for the American to commence the action.

Then he walked forward to the break of the poop, and blinked very hard at nothing in particular in the belly of the maintopsail.

Needham took good aim: the shot, passing through the maintopsail, struck the foretopmast, which fell over the side.

Up with the helm, lower the peak, ease away the main-sheet, square away the maintopsail!

The foremast had a square foresail, the mainmast a mainsail and maintopsail, and there was a spritsail on the bowsprit.