Glossary

Using reference material, this glossary has been designed to provide you with a basic explanation or definition of each of the terms provided.  This glossary will be constantly updated so please contact us, if you would like us to comment of any of the terminology used.

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

M

main boom
the spar on the lower side of a main sail
Source: Maritime Curators Group: Manual of Curatorship
main course
the lowest square sail on the main mast
Source: Maritime Curators Group: Manual of Curatorship
main deck
principal deck of a vessel
Source: Country Life Book of Nautical Terms Under Sail
main hold
main cargo space beneath the main hatch
Source: Country Life Book of Nautical Terms Under Sail
main mast
the centre mast on a three-masted vessel or the foremost on a two-masted vessel
mainsail
a three or four sided sail hoisted on the main mast
Source: Maritime Curators Group: Manual of Curatorship
mainsheet
the rope purchase used to trim the mainsail
Source: Maritime Curators Group: Manual of Curatorship
margin plank
the outermost deck plank
Source: MDA: Waterways Object Name Thesaurus
martingale
a stay below the jibboom which pulls downwards to counteract the upwards pull on the forestay, usually led round the dolphin striker
Source: Maritime Curators Group: Manual of Curatorship
mast
a vertical or near vertical timber or assemblage of timber, usually supporting yards or gaffs
mast bands
hoops of iron or steel round a mast at intervals to clamp together the timbers forming the mast
Source: Maritime Curators Group: Manual of Curatorship
mast box
heavily constructed wooden box with a hollow centre to house and support a narrow boat's sliding towing mast
Source: MDA: Waterways Object Name Thesaurus
mast step
a fitting used to locate heel of a mast
mast truck
a cap on the top of a mast
master partner
framing or pieces of timber fitted into apertures of the deck to support a mast
messenger
rope passed round the capstan with its ends lashed together to form an endless line, used to heave in the anchor cable
Source: Country Life Book of Nautical Terms Under Sail
midship section
a vertical transverse section at the maximum beam, comprising floor, bilge and topside
mine laying submarine
submarine built or adapted to carry mines and lay minefields
Source: National Monuments Record: Maritime Craft Type Thesaurus
minelayer
a ship designed or modified to carry large numbers of mines and be able to lay them as a minefield
Source: National Monuments Record: Maritime Craft Type Thesaurus
minesweeper
a vessel designed or adapted to sweep and explode mines laid at sea
Source: National Monuments Record: Maritime Craft Type Thesaurus
mixed framing
framing in which futtocks and floors alternate
mizzen mast
the mast third from the bows, usually the after mast
Source: Maritime Curators Group: Manual of Curatorship
monkey poop
low poop deck
Source: Country Life Book of Nautical Terms Under Sail
moonsheered
a vessel with a more than usual sheer forward and aft
Source: Country Life Book of Nautical Terms Under Sail
mooring pin
metal pin to which mooring ropes are tied - either fixed to the vessel or hammered into the bank
Source: MDA: Waterways Object Name Thesaurus
motor gunboat
a small fast warship powered by diesel or petrol engines. Built during World War II for coastal patrol work and anti shipping missions close in shore
Source: National Monuments Record: Maritime Craft Type Thesaurus
motor torpedo boat
small warship powered by petrol or diesel engines and armed with torpedo tubes and small guns. Used for coastal anti shipping patrols and warfare in coastal waters
Source: National Monuments Record: Maritime Craft Type Thesaurus
multi-chine
a hull where the planking forms several sharp angles in the cross in sectional shape

thole pin:

a single pin or one of a pair rising vertically from the sheer and acting in a variety of ways to provide a fulcrum for the oar