Soft wood ships classed A (red) in Lloyd's are to have their freeboards by the tables increased 10 per cent. Soft wood ships classed E in Lloyd's are to have their freeboards increased 20 per cent. Soft wood ships without class are to have their freeboards by the tables increased 25 per cent unless opened out for survey when their freeboards will depend upon their condition. Iron and steel sailing vessels having a greater rate of rise of floor than 1 inches per foot_of_half_breadth may have the moulded depth to be used with the tables reduced by half the difference between the total rise of floor at the half breadth and the total rise at the standard rate of 11⁄2 inches per foot; 2 inches per foot of half breadth is to be the maximum rate of rise on which an allowance is to be made. When the reserve buoyancy is calculated, the percentage taken shall be that corresponding to the depth reduced as above, but in no case shall the freeboard be less than that given in the top line of Table D for such percentage. Whichever method be adopted the correction for length is to be applied in relation to the reduced moulded depth. RULES TO REGULATE THE DEPTH OF LOADING 1. A turret is a strongly-constructed continuous erection at the middle line of the vessel, forming with the main or harbour deck an integral part of the hull, having a breadth not less than of the greatest breadth of the vessel and a height not less than 25 per cent of the moulded depth. In assigning freeboards to turret-deck vessels, the following rules should be observed: 2. Hatch coamings at least 2 ft. high and casings to engine and boiler openings at least 4 ft. 6 ins. high to be fitted above the "turret" deck. Any scuttles or other openings in the harbour deck are to be closed water-tight by means of iron or steel plates not less in thickness than the harbour deck, suitably stiffened and strongly bolted in place. The following method of computing the freeboard is based on the consideration that the turret-deck hatchways are provided with permanent means of closing them, as described in clause 8 of the rules for shelter-decked steamers. 3. The volume of the turret to be estimated from a normal beam line drawn through the point where a vertical line at the quarter breadth of vessel cuts the upper surface of the vessel's deck. Where the turret is nearly one-half the breadth of the Rules for Loading of Turret-deck Vessels 103 vessel, and its transverse section is of rounded form at its base, the base line of the turret is to be drawn through the point where the vertical line at the quarter breadth cuts the upper surface continued in the same curve as the normal line of beam. 4. The reserve buoyancy required by the tables to be estimated by taking 70 per cent of the volume of the turret. The height of the turret allowed for is not to exceed 25 per cent of the moulded depth. (It is to be understood that no correction is to be made for an unsheathed iron harbour deck in applying the buoyancy method.) 5. The moulded depth of the vessel to be taken to be the depth at side from the beam line, as before defined, to the top of the keel. 6. If a vessel has sheer, to determine the volume of the turret, the turret base line to be drawn at each section as described above. At the extreme fore end of the vessel the base of the turret to be parallel to the turret deck. 7. Where a poop and forecastle or a forecastle only are fitted on the top of a turret, the allowance for them is to be as follows: When the effective length of these erections is equal to of the vessel's length, deduct 8 per cent of the difference between the freeboards in Table A (after correction for sheer) and Table C. For erections of greater or less length the allowance is to be in proportion to the length. The allowance for such erections is not to exceed 10 per cent of the difference between the freeboards in Table A (after correction for sheer) and Table C. The effective length of a poop or forecastle is to be obtained by multiplying its actual length by the ratio which its breadth bears to the breadth of the ship at the after end of the forecastle or fore end of the poop respectively. The provisions of the freeboard tables regarding the height of forecastles, the bulkheads at the after end of forecastles and at the fore end of poops, and the means of closing the openings in poop bulkheads, are to be applied in these cases. 8. The method described above is only applicable when it is possible to obtain a correct drawing of the "lines" of the vessel, and it is only to be employed when facilities are given for verifying the drawing by actual measurements at the ship, in accordance with para. 6 of the freeboard tables. When a verified drawing is obtainable, either the foregoing or the following method may be employed at the option of the owner, but if a verified drawing is not obtainable, the following method only is to be employed. 9. The depth of hold to be used in obtaining the coefficient of fineness in vessels having either an excess or deficiency of sheer is to be modified as described in para. 3, and the coeffi cient thus obtained is to be modified when the vessel is of rounded form at the gunwale, the necessary addition in ordinary cases being .01. 10. The length correction under para. 9 of the load-line tables is to be of that specified in Table A, where the breadth of the turret is of the breadth of the vessel, but the table correction is to be halved where the breadth of the turret is f or more of the breadth of the vessel. For turrets having breadths between and f, the length correction is to be in proportion. 11. In making the sheer correction in accordance with para. 18 of the load-line tables, the sheer is to be measured at the ends of the vessel. 12. The effective length of the turret is to be obtained by multiplying its length by the ratio of the mean breadth of the turret to the breadth of the vessel amidships. 13. The deduction from the freeboard shown in the tables on account of the turret is to be as follows: Where the effective length of the turret is of the length of vessel deduct 45 per cent of the difference between the freeboards in Table A (after correction for sheer) and Table C. Where the effective length is 1, deduct 55 per cent, and so on in proportion. For intermediate lengths intermediate percentages are to be taken. 14. In those vessels having unsheathed harbour or main decks, a correction should be made, when employing the linear method of computation, as described in para. 6 (b). 15. The transverse and longitudinal strength of the vessel are to be regulated by that required for a "three-deck" vessel of the same length, breadth, moulded depth, and coefficient of fineness, and the scantlings of the turret are to be determined so that the stress per square inch upon the material of the turret amidships shall not exceed that of a standard vessel of the same dimensions and form, and having scantlings equal to the requirements of the 100 A class in Lloyd's Register (1885) for threedeck vessels when loaded to the freeboard given in Table A after deducting 12 per cent from the same. 16. Should a vessel be constructed with a turret less than the breadth of the vessel or less in height than of the moulded depth, or should the radius of curvature at the gunwale exceed 20 per cent of the moulded depth, or should the centre line of the disc when ascertained reach a point above the junction of the vertical side with a rounded gunwale, full particulars and calculations with the proposed assignment are to be submitted to the Board of Trade before freeboards are assigned. 17. The freeboards in the certificates issued are to be set off in feet and inches from the line of the turret deck. RULES FOR THE DETERMINATION OF THE FREEBOARD OF SHELTER-DECKED STEAMERS By the term "shelter-decked steamer" is meant, for the purpose of the following instructions, a steam vessel having a complete superstructure of a substantial character extending over the whole length of the vessel, the superstructure deck (hereinafter called the shelter-deck) being continuous and unbroken at the sides of the vessel, but having one or more openings at the middle line, which have no permanent means of closing them, but which may not have means for temporarily closing them. All hatchways in the deck immediately below the shelterdeck should be properly framed with substantial coamings, hatch covers, and shifting beams, etc., as described in paragraph 24. The hatchways should have efficient means of battening down as described in clause 7 of these rules and any stairways or similar openings should have efficient means of closing. In assigning freeboards to shelter-decked vessels, the following rules should be observed: (1) In making the sheer correction in accordance with para. 18 of the load-line tables, the sheer is to be measured at the ends of the vessel, and the freeboard corrected for sheer in estimating the allowance for erections. (2). (a) In the case of shelter-decked vessels having only one opening in the shelter-deck, the length correction under para. 9 of the load-line tables is to be one-half that specified in Table A; and the allowance for deck erections is to be determined under para. 11 in the manner specified below, provided that the effective length of the deck erections, when assessed on the assumption that the opening in the deck is an open well, and in accordance with the different regulations contained in the load-line tables affecting poops, bridges, and forecastle, open or closed, is not less than of the length of the vessel. (b) In the case of shelter-decked vessels having an opening at each end of the vessel, and also in the case of vessels having more than two openings in the shelter-deck, the allowance for deck erections is to be determined under para. 12 of the tables, the length correction under para. 9 of the load-line tables is to be one-half that specified in Table A, provided that the effective length of the deck erections, when assessed on the assumption that each opening in the deck is an open well, and in accordance with the different regulations contained in the load-line tables affecting poops, bridges, and forecastles, open or closed, is not less than of the length of the vessel. (3) The effective length of the deck erections is to be calculated in the following manner, provided the openings in the shelter-deck do not exceed half the vessel's breadth at the middle of the length of the opening. The length to be taken in the first instance as if each opening were an open well, the value of each part being assessed on that assumption in accordance with the different regulations contained in the load-line tables affecting poops, bridge-houses, and forecastles, open or closed, and also in accordance with the regulations regarding bridgehouses not covering the engine and boiler space. The final allowance for erections will depend upon whether or not temporary but efficient means are provided for closing the openings in the shelter-deck. (a) If efficient means as specified below are provided for temporarily closing the openings in the shelter-deck, the effective length of the deck erections is to be reckoned as the length computed as prescribed above, plus half the difference between that length and the length of the vessel. (b) If efficient means for temporarily closing the openings are not provided, the effective length of the erections is to be computed by adding to the length computed as above one-fourth, instead of one-half, the difference between that length and the length of the vessel. (c) If the openings in the shelter-deck are wider than as specified above, the addition to the assumed length of erections is to be modified in proportion to the relation which the actual opening holds to the specified breadth and to a complete well. 4. Means for temporarily closing the openings in the shelterdeck may be regarded as efficient, if they are at least equivalent to the following in strength and security. The portable planks for closing the openings to be not less in thickness than required by para. 43 of Lloyd's Rules (1885) for the flat of awningdecks. The planks to be supported by portable beams, fitted either longitudinally or athwartships, spaced not wider than 5 feet apart, and efficiently secured at their ends, and the deck in way of the openings to be efficiently supported by pillars from the deck below. The portable planks to be provided with eye bolts and lashings, or some other equally efficient means of securing them in place. 5. If efficient means are provided for temporarily closing the openings in the shelter-deck in heavy weather, the freeing ports required by para. 11 (e) need not be provided. If, however, efficient means for closing the openings are not provided, whether in vessels with one or more than one opening in the shelter |