MFD

Multi-Function Display — a large chartplotter screen able to show radar, AIS, sonar, engine data, camera feeds, and charts, usually linked by NMEA 2000 or Ethernet.

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Related M-terms

MOB button

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

Mizzenmast

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

Maststep

The fitting (on deck or on the keel) into which the foot of the mast is stepped.

Mizzen

The small sail set on the mizzenmast of a ketch or yawl.

MPPT charge controller

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

Mast

The vertical spar — originally timber, today commonly aluminium or carbon — from which the…

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