§ 2.69 Definitions of enclosures on or above the upper deck. Break. A break is the space above the line of the under side of the upper deck when that deck is cut off and continued at a higher elevation. The height of a break is the distance from the said line to the under side of the break deck. Bridge. A decked erection usually from 6 to 8 feet in height and of undefined length, fitted about amidships and extending from side to side over the upper deck of a vessel. Chart house. A house, room or space designated for the purpose of navigation in connection with the stowage and use of charts and navigating instruments necessary to the plotting of the course of the vessel. Deck house (formerly called roundhouse). An erection on or above the upper deck but not extending from side to side of the vessel, as is the case with a bridge, a forecastle, a poop, or raised quarter-deck. For descriptive purposes on vessel documents, spaces not extending from side to side of the vessel, such as cabin trunks, and closed-in spaces over the holds of motorboats, etc., may be classed as deck houses. Excess hatchways. The difference between one-half of 1 percent of the gross tonnage exclusive of hatchways and the aggregate tonnage of the hatchways. Forecastle. A structure on and located at the extreme forward end of the upper deck and having its sides completely enclosed by a continuation upward of the vessel's outer skin. Light and air spaces. The portion of the spaces within the casings around the boiler and engine hatches and above the upper deck to the hull of a vessel when used for admission of light and air to the boilers or machinery below. Poop. A structure on and located at the extreme after end of the upper deck and having its sides completely enclosed by a continuation upward of the vessel's outer skin. 99-138-69 Radio house or space. A structure or space in which the radio apparatus is installed and which may or may not provide accommodations for the operator or operators when off duty. Side house. A small house at the side of the upper, forecastle, bridge, or poop deck, etc., of a vessel. Superstructure. Any superstructure the breadth of which (at all points throughout its length) is approximately equivalent to the breadth of the upper deck, and the side frames of which are entirely independent of the main frames of the vessel. This definition is not applicable to forecastle, bridge, or poop. § 2.70 Definitions of items of deduction. Anchor gear. The space below deck occupied by chains or cables, machinery, etc., for handling the anchor. Boatswain's stores. The spaces for storing paints, oils, blocks, hawsers, rigging, deck gear, etc., in charge of the boatswain and for daily use on the vessel. Chart house. (See definition in § 2.69.) Crew spaces. The space appropriated exclusively to the use of the crew of a vessel, except such spaces as the engineer's workshop, carpenter shop, plumber shop, butcher shop, etc., whereever situated. The total of all crewspace deductions will be shown on vessel's documents under the head of "Crew space." Master's cabin. A space for the exclusive use of the master, consisting of sleeping room, bathroom, dressing room, office, and passageways serving his accommodations. Radio house. (See definition in § 2.69.) Steering gear. The space below deck occupied by machinery, fittings, etc., for operating the steering gear. Storage of sails. The space in a vessel propelled wholly by sails used exclusively for storing the same, subject to the limitation of 22 percent of the vessel's gross tonnage. right angles to the fore and aft center line of a vessel. Batten. A board several inches in breadth, usually fitted on the side frames in holds and between decks of vessels instead of ceiling. Beam. An athwart member supporting a portion of a deck. Also the breadth of the vessel. Between decks. For measurement purposes it is the space between the second and third and third and fourth decks, etc., the decks being numbered from below. Body plan. A drawing consisting of a pair of half transverse elevations or end views of a vessel, both having a common vertical middle line, so that the righthand side represents the vessel as seen from ahead and the left-hand side as seen from astern. On the body plan appear the forms of the various cross sections. The curvature of the rail and deck lines at the sides, and with the water lines, buttock lines, and diagonal lines indicated as straight lines. Booby hatch. A small companion fitted with a sliding top. Break in double bottom. The point where the line of the inner bottom is broken by being either raised or lowered from the normal line of same. Bulkhead. Bulkheads are partitions by which compartments, etc.. are formed, or the hold of a vessel is divided. Bulwark. A term applied to the strake of shell plating or the side planking above the weather deck and usually extends between the forecastle and the bridge or the bridge and the poop. Ceiling. The covering of wood planking on the inboard face of a vessel's side frames, bottom frames, floor timbers, and sometimes on the under side of deck beams. Cellular double bottom. A term applied when the double bottom is divided into numerous compartments by the floors and longitudinals. Coaming. The vertical boundary around a hatch, skylight, etc., the "sill" below a tonnage opening in a bulkhead. Cockpit. A space at the bottom of which is a platform sunk below the line of the upper deck on small craft. Companion. A small structure sheltering a deck opening affording entrance to a companionway. Companionway. A stairway or ladderway leading to a space above or below. |