Section 26(4) in The Merchant Shipping (Prevention of Pollution by Oil from Ships) Rules, 2010
(4)The length of each cargo tank, shall not exceed 10 m or one of the following values, whichever is the greater.-(a)where no longitudinal bulkhead is provided inside the cargo tanks:(0.5 bi/B + 0.1)L but not to exceed 0.2L(b)where a centerline longitudinal bulkhead is provided inside the cargo tanks:(0.25 bi/B + 0.15) L(c)Where two or more longitudinal bulkheads are provided inside the cargo tanks.-(i)for wing cargo tanks: 0.2L(A)if Bi/B is equal to or greater than one fifth: 0.2L(B)if Bi/B is less than one fifth-(I)where no centerline longitudinal bulkhead is provided:(ii)for centre cargo tanks.-(0.5 bi/B + 0.1)L(II)where a centerline longitudinal bulkhead is provided:(0.25 bi/B + 0.15)Lwhere bi is the minimum distance from the ship's side to the outer longitudinal bulkhead of the tank in question measured inboard at right angles to the centerline at the level corresponding to the assigned summer freeboard.
