The position of a vessel when securely moored on a berth in port. To the leeward side (away from the wind).Ī vessel’s internal passageway or corridor. The purpose of the air port is to provide light and ventilation to and vision from the interior.Ī metal air-tight tank built into a boat to insure flotation even when the boat is swamped.Ī door so constructed that, when closed, air cannot pass through. Sometimes called an air gun or “gun”.Īn opening in the side of a ship or a deck house, usually round in shape and fitted with a hinged frame in which a thick glass light is secured. Hammer driven by compressed air for riveting, or chipping. The vertical distance from the summer waterline to the highest point in the ship, usually the top of a mast. It protects the deck structure from heat and helps ventilate the fireroom. That part of the stern which overhangs the keel.Ī call used in hailing a vessel or boat (hey!).Ī ring-shaped plate coaming surrounding the stack and fitted at the upper deck, just below the umbrella.

On submarines or ships having a similar stern, it is a vertical line passing through the points where the design waterline intersects the stern of the ship> The vertical line through the intersection of the load water line and the after edge of the stern post. This bulkhead forms the forward boundary of the after-peak tank and should be made watertight. It is generally almost entirely below the load water line.Ī term applied to the first transverse bulkhead forward of the stern post. Radiating cant frames fastened to transom plates.Ī compartment just forward of the stern post. (Opposite to forward.)Ī tank or compartment located abaft the aftmost watertight transverse bulkhead above propeller(s) and rudder (often used for fresh water or sea water ballast).Ī term applied to a deck aft to the midship portion of a vessel. Loose from the moorings (not tied or secured).Ī term used for the largest dry bulkcarriers.Īt, or towards the stern of a vessel. The other approach uses the concept of lost buoyancy.Ĭomes from the Arabic “Emir” or “Amir” which means “First commander” and “Al-bahr which means “the sea”. It regards the water which has entered as an added weight, the basic hull envelope remaining. One method used in the calculation of a ship’s damaged stability when it is partially fl ooded. The effective increase in mass of a hull, due to the entrained water, when in motion. The portable steps from the gangway down to the waterline.Ī solid piece of metal shaped like an acorn, and used to finish off the top of an upright in a railing contructed of pipe. Holes cut in ship’s structure to permit entering or leaving various compartments. The next grade above the beginning grade of ordinary seaman in the deck crew.Ībove decks without concealment of deceit (out in the open).Ī bushing plate around a hole in which a pintle works. The bearing of an object 90 degrees from ahead (in a line with the middle of the ship). Get away from the ship, as in an emergency. Said of the bearing of an object which bears between the beam and the stern (further back than the ship’s middle). Thus, the mainmast is abaft the foremast (in back of).

2HĪ relative term used to describe the location of one object in relation to another, in which the object described is farther aft than the other. The majority of the information presented below has been compiled from various sources either from the internet or through personal day to day work experience and is being updated at regular intervals. Please do not hesitate to contact us for any queries or ideas for improvement of the maritime dictionary. The best way to find the definition of the term you are searching for is by pressing ctr+f in your web browser to pop up the search bar and type the term you want to find. The OOW Maritime Dictionary is updated at frequent intervals.

Marine talk for roger that meaning