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. §2.69.) (See definition in 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. § 2.71 Definitions of structural terms, etc. 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 companion way. Companionway. A stairway or ladderway leading to a space above or below. Covering board. A plank or a strake of planking fitted horizontally on top of frame heads at the line of weather deck. Crown. A term sometimes used to denote the round up or camber of a deck. Deck hook. A wooden hook or knee on the level of deck beams on which the extreme forward ends of deck planks rest and to which they are fastened. On iron or steel vessels, a plate connecting the extreme ends of deck stringer plates. Depth of frame. The depth of a bottom frame is its perpendicular height. (See d, Figure 1 (§ 2.65)). The depth of a side frame is the athwart distance between its inboard and outboard face. Double bottom. Compartments at bottom of ship between inner and outer bottom plating, used for ballast tanks, water, fuel oil, etc. Fidley hatch. Hatch around smokestack and uptake. Flange. Portion of a plate or shape at, or nearly at right angles to main portion. Flare. A spreading outward and upward. Floor or floor timber. The lowermost piece of timber connecting the main frames, notched to fit over the keel or keelson and extending the full depth of the frames to which it is fastened. In an iron or steel vessel a plate placed vertically in the bottom, extending from bilge to bilge, in way of each frame, to which it (the frame) is connected. In double bottoms of the usual construction it extends from the outer to the inner bottom thereof. Frame. One of the numerous transverse (longitudinal in Isherwood-type vessels) "ribs" that form the framing of a vessel. Frame bracket. A plate connecting a side frame to the margin plate. Freeing port. An opening in the bulwark or shell plating between the shelter and upper decks for discharging large quantities of water which may be shipped. Plans General arrangement plans. showing the various quarters, spaces and compartments into which a vessel is usually divided. Gudgeon. Fittings on the sternpost to take the rudder pintles. Gunwale. A term applied to the line where an upper deck stringer intersects the shell. Hatchway. An aperture in a vessel's deck through which cargo is laden or discharged; in common practice the term "hatch" is also applied. Hold. For admeasurement purposes, that portion of the vessel below the tonnage deck. Horn timber. The center line frame in the stern of a wooden vessel, extending aft from the sternpost. Inboard profile. Drawing of a vessel cut vertically through its longitudinal center line, showing its forward and after perpendiculars, line of deck at center and side, height of decks, tanks, height of bottom frames or floors and their spacing, assignment of various spaces, machinery, etc. Inner bottom. Plating forming the upper boundary of the double bottom. Also called the tank top. Keel. In wooden and composite vessels it is composed of pieces of timber and extends from stem to sternpost and is the bottom member of the vessel's structure. In iron or steel vessels it consists of long bars fitted vertically or of plates fitted horizontally at the middle line. Keelson. In wooden vessels the keelson is composed (like the keel) of various pieces of timber placed on the bottom frames directly over and in line with the keel and extending all fore and aft. In iron or steel vessels the middle-line keelson is the keelson at the center line, directly over the keel. Length between perpendiculars. The length of a vessel measured from the forward edge of the stem where it intersects the load water line to the after perpendicular. Length over all. The length of a vessel measured from the foremost part of the stem to the aftermost point of the stern. Limber strake. The fore and aft plank of bottom ceiling laid next to the keelson. Longitudinal framing. A system of construction in which, in conjunction with deep web frames, the main frames are run fore and aft instead of athwartships. Main rail. Rail fitted on the upper edge of bulwark plating, or upon the stanchions surrounding an upper deck. Margin plate. The outer boundary of the inner bottom, connecting it to the shell plating at the bilge. Midship cross section. A drawing of a vessel cut athwartship at about midlength, showing moulded depth, moulded breadth, round or pitch of beam, depth of side and bottom frames, floors, etc. Orlop deck. The lowest partial deck. Outboard. Away from the center line, towards the side of the vessel. Pintle. Fitting or pin on the rudder which turns in a gudgeon. Planking. A term applied to wood decks and to the outside planking of wood or composite vessels. Plating. The plates of the shell, decks, bulkheads, etc. Quadrant. A casting, forging or builtup frame in the shape of a sector of a circle attached to the rudder stock and through which the steering gear leads turn the rudder. Rabbet. A groove or channel cut in a piece of timber to take the edge of a plank, or the ends of a number of planks. Rake of the bow. The inclination of the line of the stem from the forward perpendicular. Rake of the stern timber. Its (stern timber) inclination from the after perpendicular. Reverse frame. An angle bar or other shape riveted to the top of floors and/or the inner edge of a transverse frame to reinforce it. Rudder post. See sternpost. Rudder stock. The main piece of the rudder frame, to which the pintles are connected and to the upper end of which the quadrant or tiller is fitted. Samson post. A heavy vertical post that supports cargo booms. Scantlings. Dimensions of various members that are used in the construction of a vessel. Scupper. A round or oval aperture usually fitted in decks for the purpose of drainage. Settling tanks. Oil tanks used for separating entrained water from the oil. The oil is allowed to stand for a time, to permit the water to settle at the bottom when it is drained or pumped off. Shaft tunnel. Enclosed alley-way around propeller shaft. Shelf. A fore and aft timber fitted to the frames and forming a support for the ends of the deck beams. Shell plating. The plates forming the outer skin of the hull. Sheer. The amount by which the height of the weather deck at the forward and after perpendiculars exceeds this height at the mid-perpendicular. Skin. A term usually applied to the outside planking or plating. Skylight. A built-up frame of wood or metal having glass lights fitted in the top and installed over a deck opening for the purpose of furnishing light and air to the spaces below. Stem. In the case of wooden vessels, it is the heavy piece of timber at which the outside planking terminates at the forward end of the hull. In iron or steel vessels it is the heavy piece of iron or steel extending from the keel to above the uppermost weather deck, and forming the extreme fore end of a vessel. Stern. The after end of a vessel. Sternpost (main). In wooden vessels, the piece of timber extending from the after end of the keel to the uppermost deck and to which the rudder braces are fixed to receive the pintles by which the rudder is hung. In iron or steel sailing vessels, paddle and twin-screw steamers, the heavy forging or casting of iron or steel extending from the after end of the keel (to which it is scarfed) to an appropriate distance within the hull; in single screw steamers, the after part of the stern frame. Stiffener. An angle bar, T-bar, channel bar, etc., used to stiffen plating of the bulkhead, etc. Strake. A fore and aft continuous course or row of shell or other plating or planking. Tank top. Plating forming the top of a double bottom. The inner bottom. Transom. A floor plate extending across the vessel at the forward side of the sternpost and attached thereto. Transverse framing. Athwartship and vertical members forming the vessel's framing. Opposite to the longitudinal system of framing. Tumble home. An inboard sloping of the vessel's side. (The opposite to flare.) Web frame. Members built of plates and angles, spaced at required intervals, and fitted in lieu of main frames for the purpose of local strengthening. Longitudinal. A fore and aft vertical member running parallel, or nearly parallel, to the center vertical keel through the double bottom. The Wheelhouse (or pilot house). house in which a steering wheel is located for the steering and navigation of the vessel. U.S.C. 1624, 46 U.S.C. 2, 3, Gen. Hdnote. 11, Tariff Schedules of the United States, except as otherwise noted. SOURCE: The provisions of this Part 3 appear at 28 F.R. 14575, Dec. 31, 1963, unless otherwise noted. GENERAL §3.1 General definitions. For the purposes of this part and Part 4 of this chapter: (a) The word "vessel" includes every description of watercraft or other contrivance used or capable of being used as a means of transportation on water, but does not include aircraft. (b) The term "vessel of the United States" means any vessel documented under the laws of the United States. (c) The term "documented" means registered, enrolled, and licensed, or licensed under the laws of the United States, whether permanently or temporarily. (d) The term "marine document" includes registry, enrollment and license, and license. It does (e) The term "port of documentation" means the home port of a vessel. not include a port in which a temporary document is issued. (f) The term "mortgagee," in the case of a mortgage involving a trust deed and a bond issue thereunder, means the trustee designated in such deed. (g) The term "noncontigious territory of the United States" includes all the island Territories and possessions of the United States, but does not include the Canal Zone. (h) The term "parent corporation" means a corporation incorporated under the laws of the United States, or any State, Territory, District, or possession thereof, which controls, directly or indirectly, at least 50 percent of the voting stock of a corporation which is a citizen of the United States as defined in §3.19(a) (4) and for which there is on file with the proper collector of customs a valid and current certificate under oath as required by § 3.21a. (i) The term "subsidiary corporation” means a corporation incorporated under the laws of the United States, or any State, Territory, District, or possession thereof, not less than 50 percent of the voting stock of which is controlled, directly or indirectly, by a corporation which is a citizen of the United States as defined in § 3.19 (a) (4) or by a parent corporation of any such corporation and for which there is on file with the proper collector of customs a valid and current certificate under oath as required by § 3.21a. (Sec. 27A, 72 Stat. 1736; 46 U.S.C. 883-1) § 3.2 Vessels entitled to documents. (a) A vessel of 20 net tons or more may be registered or enrolled and licensed. A vessel of 5 net tons or more but less than 20 net tons may be licensed (except vessels subject to the provisions of paragraph (b) of this section) or registered. (b) Any vessel of 5 net tons or more which is to be documented for navigating the waters of the northern, northeastern, or northwestern frontiers otherwise than by sea shall be granted a frontier enrollment and license, customs Form 1273, except that a vessel used exclusively as a pleasure vessel on those waters may be granted an enrollment and license as a yacht, customs Form 1290, if entitled to be so documented in accord(See ance with the provisions of § 3.4. § 3.40.) (c) The following classes of vessels are entitled to receive documents under existing laws: Class 1. Any vessel built in the United States and wholly owned by a citizen.' A vessel of this class owned by a corporation which is qualified as a citizen of the United States under the definition contained in § 3.19 (a) (4) may be documented for use in the coastwise trade within the limitations specified in the Act of September 2, 1958 (46 U.S.C. 8831), if it is a non-self-propelled vessel or a self-propelled vessel of less than 500 gross tons (see also § 3.19(e)). Class 2. Any vessel purchased from the Maritime Administration or War Ship(See ping Administration by a citizen. § 3.42.) Class 3. Any vessel built in the United States in whole or in part for the account of one who is not a citizen and then recorded, which thereafter becomes wholly owned by a citizen and has never before been documented. (See § 3.47.) Class 4. Any vessel captured by a citizen in a war to which the United States is a party, which has been lawfully condemned as a prize and is wholly owned by a citizen. Class 5. Any vessel which has been judicially forfeited for a breach of the laws of the United States when wholly 2 For the meaning of the word "citizen" in this section, see § 3.19. |