Mizzenmast

The shorter mast stepped aft of the mainmast on a ketch or yawl.

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Related M-terms

Magnetic

Referring to the magnetic north pole rather than true geographic north.

MPPT charge controller

Maximum Power Point Tracking charge controller — an electronic regulator that continuously…

Masthead

The top end of the mast, often carrying a wind instrument, anchor light, VHF antenna, and …

Mainmast

The taller (main) mast on a vessel with more than one mast.

Mainsail

The principal sail set on the (main) mast of a sloop, cutter, ketch, or yawl.

MOB button

A dedicated button on a GPS, chartplotter, or autopilot that marks the current position th…

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