§ 135.4 35 CFR Ch. I (7±1±97 Edition) documentation may result in the Com- line of the flat of the bottom continued mission's developing a figure that ac- inwards cuts the side of the keel. curately reflects the vessel's volume. (2) In ships having rounded gunwales, the moulded depth shall be measured (Approved by Office of Management and Budget (OMB) under control number 3207± to the point of intersection of the 0001) moulded lines of the deck and side shell plating, the lines extending as [59 FR 43255, Aug. 22, 1994, as amended at 61 though the gunwales were of angular FR 60612, Nov. 29, 1996] design. § 135.4 Administration and interpreta- (3) Where the upper deck is stepped tion of rules. and the raised part of the deck extends over the point at which the moulded The rules of measurement provided depth is to be determined, the moulded in this part shall be administered and depth shall be measured to a line of ref- interpreted by the Administrator of erence extending from the lower part of the Panama Canal Commission. the deck along a line parallel with the raised part. Subpart BÐPC/UMS Net Tonnage (c) Breadth or moulded breadth means Measurement the maximum breadth of the ship, measured amidships to the moulded § 135.11 Tonnage. line of the frame in a ship with a metal (a) The tonnage of a ship shall con- shell and to the outer surface of the sist of PC/UMS Net Tonnage. hull in a ship with a shell of any other (b) The net tonnage shall be deter- material. mined in accordance with the provi- (d) Enclosed spaces mean all spaces sions of the regulations in this subpart. which are bounded by the ship's hull, (c) The net tonnage of novel types of by fixed or portable partitions or bulk- craft whose constructional features are heads, by decks or coverings other than such as to render the application of the permanent or movable awnings. No provisions of the regulations in this break in a deck, nor any opening in the subpart unreasonable or impracticable ship's hull, in a deck or in a covering of shall be determined in a manner which a space, or in the partitions or bulk- is acceptable to the Panama Canal heads of a space, nor the absence of a Commission. partition or bulkhead, shall preclude a space from being included in the en- § 135.12 Definitions. closed space. (a) Upper Deck means the uppermost (e) Excluded spaces mean, notwith- complete deck exposed to weather and standing the provisions of paragraph sea, which has permanent means of (d) of this section, the spaces referred weathertight closing of all openings in to in paragraphs (e)(1) to (e)(5) of this the weather part thereof, and below section. Excluded spaces shall not be which all openings in the sides of the included in the volume of enclosed ship are fitted with permanent means spaces, except that any such space of watertight closing. In a ship having which fulfills at least one of the follow- a stepped upper deck, the lowest line of ing three conditions shall be treated as the exposed deck and the continuation an enclosed space: of that line parallel to the upper part ÐThe space is fitted with shelves or other of the deck is taken as the upper deck. means for securing cargo or stores; (b) Moulded Depth means the vertical ÐThe openings are fitted with any means of distance measured from the top of the closure; or keel to the underside of the upper deck ÐThe construction provides any possibility at side. of such openings being closed. (1) In wood and composite ships the (1)(i) A space within an erection op- distance is measured from the lower posite an end opening extending from edge of the keel rabbet. Where the form deck to deck except for a curtain plate at the lower part of the midship sec- of a depth not exceeding by more than tion is of a hollow character, or where 25 millimeters (one inch) the depth of thick garboards are fitted, the distance the adjoining deck beams, such opening is measured from the point where the having a breadth equal to or greater 146 VerDate 06-NOV-97 13:12 Nov 06, 1997 Jkt 174126 PO 00000 Frm 00146 Fmt 8010 Sfmt 8010 Y:\OLD_ECFR\174126.044 174126 Panama Canal Regulations § 135.12 than 90 percent of the breadth of the In the figure: deck at the line of the opening of the O = excluded space space. This provision shall be applied C = enclosed space so as to exclude from the enclosed I = space to be considered as an enclosed spaces only the space between the ac- space Hatched-in parts to be included as enclosed tual end opening and a line drawn par- spaces. allel to the line or face of the opening B = breadth of the deck in way of the open- at a distance from the opening equal to ing. one-half of the width of the deck at the In ships with rounded gunwales the line of the opening (Figure 1). breadth is measured as indicated in Figure 11 in paragraph (e)(5). 147 VerDate 06-NOV-97 13:12 Nov 06, 1997 Jkt 174126 PO 00000 Frm 00147 Fmt 8010 Sfmt 8010 Y:\OLD_ECFR\174126.044 174126 § 135.12 35 CFR Ch. I (7±1±97 Edition) (ii) Should the width of the space be- In the figures: cause of any arrangement except by O = excluded space convergence of the outside plating, be- C = enclosed space come less than 90 percent of the I = space to be considered as an enclosed breadth of the deck, only the space be- space tween the line of the opening and a Hatched-in parts to be included as enclosed parallel line drawn through the point spaces. where the athwartships width of the B = breadth of the deck in way of the open- space becomes equal to, or less than, 90 ing. percent of the breadth of the deck shall In ships with rounded gunwales the be excluded from the volume of en- breadth is measured as indicated in Figure 11 closed spaces. (Figures 2, 3 and 4). in paragraph (e)(5). 148 VerDate 06-NOV-97 13:12 Nov 06, 1997 Jkt 174126 PO 00000 Frm 00148 Fmt 8010 Sfmt 8010 Y:\OLD_ECFR\174126.044 174126 Panama Canal Regulations § 135.12 149 VerDate 06-NOV-97 13:12 Nov 06, 1997 Jkt 174126 PO 00000 Frm 00149 Fmt 8010 Sfmt 8006 Y:\OLD_ECFR\174126.044 174126 § 135.12 35 CFR Ch. I (7±1±97 Edition) (iii) Where an interval which is com- In the figures: pletely open except for bulwarks or O = excluded space open rails separates any two spaces, C = enclosed space the exclusion of one or both of which is I = space to be considered as an enclosed permitted under paragraphs (e)(1)(i) space and/or (e)(1)(ii) of this section, such ex- Hatched-in parts to be included as enclosed spaces. clusion shall not apply if the separa- B = breadth of the deck in way of the open- tion between the two spaces is less ing. than the least half breadth of the deck In ships with rounded gunwales the in way of the separation. (Figures 5 and breadth is measured as indicated in Figure 11 6). in paragraph (e)(5). 150 VerDate 06-NOV-97 13:12 Nov 06, 1997 Jkt 174126 PO 00000 Frm 00150 Fmt 8010 Sfmt 8010 Y:\OLD_ECFR\174126.044 174126 Panama Canal Regulations § 135.12 151 VerDate 06-NOV-97 13:12 Nov 06, 1997 Jkt 174126 PO 00000 Frm 00151 Fmt 8010 Sfmt 8006 Y:\OLD_ECFR\174126.044 174126 § 135.12 35 CFR Ch. I (7±1±97 Edition) (2) A space under an overhead deck side, provided that the distance be- covering open to the sea and weather, tween the top of the rails or the bul- having no other connection on the ex- wark and the curtain plate is not less posed sides with the body of the ship than 0.75 meters (2.5 feet) or one-third than the stanchions necessary for its of the height of the space, whichever is support. In such a space, open rails or the greater. (Figure 7). a bulwark and curtain plate may be fitted or stanchions fitted at the ship's (3) A space in a side-to-side erection In the figures: directly in way of opposite side open- O = excluded space ings not less in height than 0.75 meters C = enclosed space (2.5 feet) or one-third of the height of I = space to be considered as an enclosed the erection, whichever is the greater. space If the opening in such an erection is Hatched-in parts to be included as enclosed provided on one side only, the space to spaces. be excluded from the volume of en- B = breadth of the deck in way of the open- closed spaces shall be limited inboard ing. from the opening to a maximum of one- In ships with rounded gunwales the half of the breadth of the deck in way breadth is measured as indicated in Figure 11 of the opening. (Figure 8). in paragraph (e)(5). 152 VerDate 06-NOV-97 13:12 Nov 06, 1997 Jkt 174126 PO 00000 Frm 00152 Fmt 8010 Sfmt 8010 Y:\OLD_ECFR\174126.044 174126 Panama Canal Regulations § 135.12 (4) A space in an erection imme- and the space excluded from enclosed diately below an uncovered opening in spaces is limited to the area of the the deck overhead, provided that such opening.