Mooring

A permanent ground tackle — anchor, chain, and buoy — to which a vessel can secure instead of deploying her own anchor.

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Related M-terms

Marlinspike

A tapered metal spike used to loosen knots, open rope lays, and work splices.

MMSI

Maritime Mobile Service Identity — a unique nine-digit number issued to each DSC-VHF/HF ra…

Mainsail

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

MFD

Multi-Function Display — a large chartplotter screen able to show radar, AIS, sonar, engin…

Maststep

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

MPPT charge controller

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

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