- ABAFT -
- Toward the rear (stern) of the boat. Behind.
- ABEAM -
- At right angles to the keel of the boat, but not on the boat.
- ABOARD -
- On or within the boat.
- ABOVE DECK -
- On the deck (not over it - see ALOFT).
- AFT -
- Toward the stern of the boat.
- AGROUND -
- Touching or fast to the bottom.
- AHEAD -
- In a forward direction.
- AIDS TO NAVIGATION (AtoN) -
- Artificial objects to supplement natural landmarks to indicate
safe and unsafe waters.
- ALOFT -
- Above the deck of the boat.
- AMIDSHIPS -
- In or toward the center of the boat.
- ANCHOR -
- A heavy metal device, fastened to a chain or line, to hold a
vessel in position, partly because of its weight, but chiefly
because the designed shape digs into the bottom.
- ANCHORAGE -
- A place suitable for anchoring in relation to the wind, seas and
- ASTERN -
- In back of the boat, opposite of ahead.
- ATHWARTSHIPS -
- At right angles to the centerline of the boat; rowboat seats are
- BATTEN DOWN -
- Secure hatches and loose objects both within the hull and on deck.
- BEACON -
- A lighted or unlighted fixed aid to navigation attached directly
to the earth's surface. (Lights and daybeacons both constitute
- BEAM -
- The greatest width of the boat.
- BEARING -
- The direction of an object expressed either as a true bearing as
shown on the chart, or as a bearing relative to the heading of the
- BELOW -
- Beneath the deck.
- BIGHT -
- The part of the rope or line, between the end and the standing
part, on which a knot is formed. A shallow bay.
- BILGE -
- The interior of the hull below the floor boards.
- BITTER END -
- The last part of a rope or chain. The inboard end of the anchor
- BLOCK -
- A wooden or metal case enclosing one or more pulleys and having a
hook, eye, or strap by which it may be attached.
- BOAT -
- A fairly indefinite term. A waterborne vehicle smaller than a
ship. One definition is a small craft carried aboard a ship.
- BOAT HOOK -
- A short shaft with a fitting at one end shaped to facilitate use
in putting a line over a piling, recovering an object dropped
overboard, or in pushing or fending off.
- BOW -
- The forward part of a boat.
- BOW LINE -
- A docking line leading from the bow.
- BOW SPRING LINE -
- A bow pivot line used in docking and undocking, or to prevent the
boat from moving forward or astern while made fast to a pier.
- BOWLINE KNOT -
- A knot used to form a temporary loop in the end of a line.
- BOWSPRIT -
- A spar extending forward from the bow.
- BRIDGE -
- The location from which a vessel is steered and its speed
controlled. "Control Station" is really a more appropriate
term for small craft.
- BULKHEAD -
- A vertical partition separating compartments.
- BUOY -
- An anchored float used for marking a position on the water or a
hazard or a shoal and for mooring.
- CABIN -
- A compartment for passengers or crew.
- CAPSIZE -
- To turn over.
- CAST OFF -
- To let go.
- CATAMARAN -
- A twin-hulled boat, with hulls side-by-side.
- CHAFING GEAR -
- Tubing or cloth wrapping used to protect a line from chafing on a