Bawtradeck space between the second deck and the upper deek.
14
(b) If the depth so obtained does not exceed 16 feet at the amidship division of the total tonnage length, the depth at each point of division of the tonnage length, or of parts of that length as afore- said, shall be divided into 4 equal parts; depths in excess of 16 feet shall be divided into 6 equal parts.
(c) At the point of division between each of the parts obtained in accordance with sub-paragraph (5) the horizontal breadths to the ioner face of the timber, frame or sparring as the case may be shall be measured. Numbering these breadths from the tonnage deck, the even numbered breadths shall be multiplied by 4 and the others, with the exception of the first and last, by 2; these products shall be added together, and to the sum there shall k added the first and last breadibs; the quantity thus obtained shall be multiplied by one-third of the common interval between the breadths and the product shall be the transverse area in square feel.
(5) The transverse areas so obtained shall be numbered from the extreme forward point of measurement of the tonnage length, or of the parts thereof as the case may be the even numbered areas shall be multiplied by 4 and the odd numbered areas, other than the Best and last, by 2; these products shall be added together and to the sum there shall be added the area (if any) of the first and laal, the quantity thus obtained shall be multiplied by one-third of the common interval between. the areas; the product 90 obtained divided by 100 shall be the underdeck Lonnage of the ship exclusive of the tonnage of space to be included Thersin pursuant to regulation 7(8) (appendages),
(1) (4) Betweendeck space between the second deck and the upper deck shall be measured for length in a straight line in the middle plane of the ship between the points at the forward and after ends of the space where the inner surface of the frames, Linabers, ceiling or spurring as the case may be meets the middle plane of the ship at half the height between the upper surface of the deck and the underside of the deck over.
(b) Where a break exists in the second deck or the upper deck the line of the deck shall be extended through the break parallel to the raised part of the break; and the tonnage of the betweendeck space shall be measured in such a case by reference to the line of the deck so extended.
(2) The length shall be divided into equal parts as provided in paragraph 1(3) of this Rule. At cach of these points of division the horizontal breadth from the inner face of the frames, timbers of sparring as the case may be, shall be measured at half the height of the between- deck space.
(3) These breadths shall be numbered from the stem, the stem being noumber 1. The even numbered breadths shall he mustiplied by 4 and the odd numbered other than the first and last, by 2. The products shall ba added together and the first and last breadths shall be added to the sum. The quantity thus obtained shall be multiplied by one-third of the common interval between the breadths, and the area thus obtained shall be multiplied by the mean height between the upper surface of the deck and the underside of the deck over. The product so obtained divided by 100 shall be the tonnage of the betweendeck space.
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3. Breaks in the upper deck shall be measured for length in a straight line in the middle plane of the ship between the extremities of the break at half the height of the break, terminal points at the stem or term being taken as described in paragraph 2(1) of this Rule. The length so obtained shall be divided into 2 equal parts for lengths of 50 feet or less, 4 equal parts for lengths above 50 feet but not more than 225 feet and 6 equal parts for lengths over 225 feet. At each of the points of division the horizontal breadth at half the height of the break at the ship's side to the inner face of the frames, timbers or sparring as the case may be shall be measured. Numbering these breadths from the foremost terminal point, the even numbered breadths shall be multiplied by 4 and the odd numbered, other than the first and last, by 2. The products shall be added together and to the sum there shall be added the first and last breadths. The quantity thus obtained shall be multiplied by one-third of the common interval between the breadths. The area thus obtained shall be multiplied by the height of the break. The product divided by 100 shall be the Lorinage of the break.
4.
A poop, bridge or forecastle shall be measured as follows- The mean length thereof shall be measured at half the height between the upper surface of the deck and the underside of the deck over, terminal points at the stem and stem being taken as described in paragraph 2(1) of this Rute. The length so obtained shall be divided into 2 equal parts for lengths of 50 feet or under, 4 equal parts for lengths over 50 feet bul not exceeding 225 feet, and 6 equal parts for lengths exceeding 225 feet. At each of the points of division the horizontal breadth shall be measured from the inner face of the frames, ümbers or sparring as the case may be at half the height between the upper surface of the deck and the anderside of the deck over. Numbering these breadths from the foremost Kerminal point, the even numbered breedths shall be multiplied by 4 and The odd numbered, other than the first and last, by 2. The products shall be added together and to the sum there shall be added the first and last breadths. The quantity thus obtained shall be multiplied by one-third of the common interval between the breadths, and the area thus obtained shall be multiplied by the mean height of the poop, bridge or forecastle. The product divided by 100 shall be the tonnage of the poop. bridge or forecastle.
5. Permanently closed-in spaces on or above the upper deck other than those call with in paragraph 4 shall be measured by ascertaining their mean length, breadth and height and the product of multiplying these dimensions together shall, when divided by 100, be the tonnage of the space.
6. (1) Propelling machinery space which extends to the ship's side and is situated below the upper deck shall be measured as follows-
The mean length shall be measured in each space at half the mean depth, which shall be measured in the middle plane of the ship from the underside of the deck forming the crown of the space to the top of the double bottom or open floors, allowance being made for ceiling if filted; for amidship spaces 3 equally spaced breadths shall be used and for spaces abaft amidships 3 equally spaced breadths shall be used for lengths up to 30 feet, 5 equally spaced breadths for lengths over 30 feet 1o 50 feet and 7 equally spaced breadths for lengths over 30 feet, the breadths being measured from the inner face of the frames, timbers or sparring as the case may be at half the depth of the space at that point. The mean length, mean breadth and mean depth so ascertained shall be multiplied together and the product divided by 100 shall be the tonnage of the space.
Brekka in the umber deck.
Poop, bridge and forecastle,
Chcher permMELY closed-la KPROC
Ho por bone bre
upper deck.
Prope
machinery «pace.