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

D

dagger board
a board or plate, which is not pivoted, hoisted or lowered through a trunk to combat leeway
dagger knee
a knee fitted at an angle, neither vertically nor horizontally
davits
curved metal arms used in pairs with a purchase on each to hoist and lower boats
Source: Maritime Curators Group: Manual of Curatorship
deadeye
a round flat faced wooden block with three holes through which the shroud rigging lanyards are rove to tension the standing rigging
Source: Maritime Curators Group: Manual of Curatorship
deadrise
the angle between the bottom of a vessel and the horizontal in the transverse plane
deadwood
a member that joins the apron or sternson to the hog. Deadwood can also be found in the for'rd as well
deadwood knee
a knee-shaped member that joins the apron to sternson to the hog
deck
a platform, approximately horizontal
deck beam
a beam supporting deck planking. It also keeps the vessel's sides apart
deck beam (narrow boat)
a beam of metal or wood across the width of the boat which forms the front gunwale of the hold and carries the deck board
deck board
the triangular shaped board fitted at the front of the hold of a narrow boat to support the running planks and cratch and to prevent water entering the hold
Source: MDA: Waterways Object Name Thesaurus
deck head
the underside of the deck above one's head
Source: Country Life Book of Nautical Terms Under Sail
deck hook
a solid block of wood or natural crook which terminates the framing of a wooden deck at the bow, bolted to the stem post and apron
deck lid
a hinged wooden or metal lid to cover the opening in the foredeck of a narrow boat
Source: MDA: Waterways Object Name Thesaurus
deck plank
one of the planks making the deck of a vessel
Source: MDA: Waterways Object Name Thesaurus
deck plate
plate forming part of the deck of metal vessel
Source: MDA: Waterways Object Name Thesaurus
deck stops
pieces fastened to the deck in the way of the tiller to limit the sweep of the rudder
decklight
any strong glass prism fitted into a deck to permit access of light to the accommodation below
Source: Maritime Curators Group: Manual of Curatorship
deckspace
a large space in the bow of a narrow boat beneath the foredeck and accessed by the deck lid
Source: MDA: Waterways Object Name Thesaurus
decoy vessel
a vessel, usually a merchant vessel, altered to resemble a warship or another vessel.
Source: National Monuments Record: Maritime Craft Type Thesaurus
deep
a vessel which has a beam to depth ratio of 2.0 or under
deep waisted
a vessel on which the forecastle and quarterdeck are considerably higher than the upper deck
Source: Country Life Book of Nautical Terms Under Sail
depot ship
a ship acting as a base for smaller vessels and or submarines.
Source: National Monuments Record: Maritime Craft Type Thesaurus
depth
the vertical distance from the sheerline to the top of the central longitudinal member, usually amidships
derrick
a simple form of crane with a strong boom, pivotted at the base and controlled by topping lifts and guys
Source: Maritime Curators Group: Manual of Curatorship
derrick pole
a heavy pole with pulley blocks to assist in cargo handling
Source: MDA: Waterways Object Name Thesaurus
destroyer
very fast small warship, armed with small calibre guns and torpedoes. Used for attacking enemy vessels, escort duties and anti submarine duties
Source: National Monuments Record: Maritime Craft Type Thesaurus
diagonal and longitudinal planking
a hull in which the shell is formed by two layers of planks. The inner is laid at an angle to the longitudinal centreline; the outer is laid as edge-to-edge planking
diagonal build
a method of planking in which the planks are laid diagonally
diagonal planking
built with the side planking at an angle of 45 degrees with a second layer set cross-wise at right angles to the first
Source: Maritime Curators Group: Manual of Curatorship
dicky
a small seat fitted in the angle between the transom and the gunwale/top strake
dipping lug
a lugsail in which the tack secures well forward of the mast . The halyards are attached to the yard about two-fifths from its forward end
discontinuous framing
framing composed of a number of unconnected floors, futtocks and top timbers
diving support vessel
a vessel used as a base for divers on site
Source: National Monuments Record: Maritime Craft Type Thesaurus
dolphin striker
a short spar pointing downwards from the bowsprit to give the martingale a suitable angle to the end of the bowsprit so it counteracts the upward pull of the forestays
Source: Maritime Curators Group: Manual of Curatorship
dory lap
a method of lapstrake construction in which overlapping strakes are both bevelled to reduce the projection of the lap
double angle iron
form of girder made up of two angle bars riveted together
Source: Country Life Book of Nautical Terms Under Sail
double bottoms
the spaces between the inner and outer bottom plating of the hull
Source: Maritime Curators Group: Manual of Curatorship
double diagonal planking
a hull in which the shell is formed by two layers of planks crossing each other at right angles and making an angle of 45 degrees with the longitudinal centreline
double ended
a vessel which is symmetrical (or nearly symmetrical) about the midship section
double fore and aft planking
a hull in which the shell is formed by two layers of strakes fastened together with the seams of the inner strakes corresponding to the centres of the outer strakes
double frame
two frames fastened side by side so that the joins in one are clear of those on the second
double plate keelson
form of keelson made up of a vertical longitudinal plate with angle bars riveted on each side at top and bottom
Source: Country Life Book of Nautical Terms Under Sail
double rivetting
see CHAIN RIVETTING
doubling
a covering of planks fitted over the original planks
doubling plate
strake of plating fitted over the shell plating where extra strength is required
Source: Country Life Book of Nautical Terms Under Sail
doublings
that part of a built-up mast where the top of one and the foot of the other above it overlap
Source: Maritime Curators Group: Manual of Curatorship
dove tail plate
shaped plate used at the connection of the keel with the stem and stern post
Source: Country Life Book of Nautical Terms Under Sail
downhaul
any rope specifically fitted to pull anything down from aloft
Source: Maritime Curators Group: Manual of Curatorship
drag
the amount the after end of the keel is lower than the foremost end when the vessel is afloat
draught
the depth from the underside of the keel to the waterline
Source: Maritime Curators Group: Manual of Curatorship
dredger
craft used to deepen shipping channels, harbours and other water courses
Source: National Monuments Record: Maritime Craft Type Thesaurus
drifter
fishing boat using nets streamed from the bow and free to move with the tides and currents
Source: National Monuments Record: Maritime Craft Type Thesaurus
drop keel
see centreboard
drop rudder
a narrow deep rudder which extends well below the keel
dry bulk cargo carrier
a cargo vessel specially constructed to carry bulk items such as grain. Does not include liquid cargoes
Source: National Monuments Record: Maritime Craft Type Thesaurus

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