| Sailing terms beginning with M |
| Mainsail |
| The largest sail. (Except for the spinnaker.) |
|
| Mainsheet |
| The line used to pull the mainsail in or let it out. |
|
| Mast |
| The pole attached to the deck at the right angle, holding up the sails. |
|
| Masthead |
| The top of the mast. |
|
| Mizzen |
| The sail set on the second (aftermost, or rear) mast - as on a ketch. |
|
| Mooring |
| Permanent anchorage. It consists of a heavy weight (or an anchor), a chain of a certain length, and a
buoy. Mooring is also often used for piers, instead of pilings.
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