Page:United States Statutes at Large Volume 44 Part 1.djvu/1516

 § 481 q TITLE 46.- The freeboard of boats of intermediate lengths is to be found by interpolation. - ~ 2s.-Pontoon boats kewing d well deck and collapsible bulwcvrks All the conditionslaid down for boats of type IC are to be applied to boats of this type, which diier from those of type 1C only in regard to the bulwarks. . d 20.-—Pontoon boots, in which the persons can not begaccommodated below deck, having d {lush deck cmd collapsible bul- ° works V l y The minimum freeboard of boats of thi_s type is independent of their lengths and depends only 'upon their depth. iThe depth of the boat is to be measured vertically `jfrom the underside ol the garboard strake to the top of the deck on the side amldships, and the freeboard is to be measured from the top of the deck at the side amidshlps to the .water level when the boat is loaded. i. _ » ‘ 3 » l _ · The freeboard in fresh water shall not be less than the following amounts, which are applicable without correction tc boatihaving a mean shéer_·equarto 8_ per centum of their length. ” · - ‘,T ‘._ G Depth of Minimum ‘ boat freeboard , Inches. Inchu I l2 l vg i ~ 18 2 20 ·s _ , so  cs t For; intermediate] depths the freeboard is obtained by inter polation. * · . .' _ · T - If the sheer is less than the standard ruler defined. above the minimum freeboard is obtained by adding to the ilgure: in the table one-seventh of the diderence between the standart sheer and the actual mean sheer measured at the stem am sternpost. No deduction. is to be made from- the freeboard ol account of the sheer being greater than the standard sheer ox on account of the camber of the deck. · ° nroroa nous When. motor. boats are accepted, the volume of interna buoyancy and, when dttedgthe-external buoyancy, must be Exec having regard to the dlfferencebetween the weight of themoto and its accessories and the weight of the additional person ,which the boat could accommodate lf the motor and its acces -son'ies were removed;, P ‘ 'naasnosunnrs ros CLEA.R1NG’PONIOON mrmolrrs or warm All pontoon llfeboats shall be dtted with emcient means fo quickly clearing the deck of water., The oriilces forthis purpos shall be such that th`e water can not enter the boat throng them when they are lntermittlngly submerged. , The number an size of the orlnces shall be determined forreach type, of. boa bya special test. _ { W — ‘. i For the purpose oflthis-test the pontoon boat shall be loads with 'a,`·=veight'—of~lron` or bags of _ sand, equal to that of ll complement of persons and equipment, d ‘ In the case of r boattwenty-eight feet in length two ton -of water shall be cleared from. the boat in a time not exceeoxp _ the following: type 10, sixty seconds; type 2B, sixty second type_2€, twenty seconds. ‘ _ ‘ f · ln the case of a boat having a length greater or lesstha twenty—eight fectthe weight of water to be cleared ln the sam time shall. be, foreach type, directly proportional] to' the lengt or me boat;. , “

-.-SHIPPING · 1502 I ooxsrancrron or soars Open lifeboats of the first class (types 1A and 1B) must have ajnean sheer at least equal to 4 per centum of their length. { The air cases of open boats of the drst class shall be placed L along thesidesof the boat; they may also be placed at the 1 ends of the boat, but not in the bottom of the boat. jPontoon lifeboats may be built of wood or metal. If con- , structed .of wood; they shall have the bottom and deck made , of two thicknesses with textile material between; if of metal, they shall be divided into water-tight compartments with means of access to each compartment. , " 2  All boats shall be” iltted for the use of a steering oar; l · . · { PONTOON. narrs [~ “No type of, pontoonraft may be approved unless it satistles · First. It azheuld be reversible and .tltted with bulwprks of wood, canv, or other suitable material on both sides. . These _ ‘ Second. It should be of such size, strength, and weight that ` it can be handled withoutmechanical`appliances, and, if necessary, be thrown from the ·vesse1’s_ deck. · ~ ' Third. It should have not less than three cublc `feet of air. cases or equivalent buoyancy _ for each person whom it can accommodate. _— . _ x ‘. " _ , _ · Fourth. It-should have a deck area of not less thanfour ‘ `square feet_for each person whom it can accommodate and the platform should not be less than six inches above the water _ level whenjthe raft is loaded: · _ _ ‘ Fifth. The air casesor equivalent buoyancy should be placed- " as near as possible to the sides of the raft. ’¤ _- · oaracrrr or soars ann ronrooing uirrs ° { s ·, - » 3 First. The number oflpersons which a- boat. of one of the 3 standard types or a pontoon raft can _— accommodate is equal [3 to thegreatest whole number obtainedby dividing the camclty 3- in cubic feet, or the surface in square feet, of the boat or of the raft by the standard unit of capacity, or unit of surface (according to circumstances), dehned below for each type. Second. The cubic capacity infect of a boat in_whl& the Ll number of persons iis determined by the surface shall be _ as· L sumed to be ten timu the number of persons which it is au- 1, thorlred tocarry. . ·_ _ . ` B Third. The standard units of mpacity and surface are as · ,_ follows; # · ‘ . h · _ Units of capacity, open boats, type·1A, ten cubic feet; open _ boats, type 1B, nine cubic feet; ‘ .  — Unit of lsurface, Yopen boats, type 2A,   and oneyhalf ,1. square feet; pontoon boats, type 2C,- thru and one-half square B, feet; pontoon boats, type IC, three and one·fourth squarefeet; h pontoon boats, type 2B, three and onefourth muare feet. _ d, Fourth. The board of supervisingjlncpwtors, with the ap- Lt proval of. the_ Secretary. of Commerce, may accept, in place of . three and one·fourth, a smaller dlvkor, *lf.lf is satlsded after d- trial that the number of mrsonsfor whom therein se•tlng“ac·- 3 commodationln the pontoon p boat in question is  than the number obtained by applying the, above divisor., provided ts always that `the dlvisor adopted in place of three and one· S fourth may never be less than ’; - carlcxrr uxrrs __ n Pontoon boats and pontoon rafts shall never be marked with ie a number of persons greaten than that obtained in the manner h speclhed in this section. —‘_- - a . _ Thisnumber shall be reduced-Y
 * the following conditions; . _ `
 * bulwarks, may  collapsible, ‘ · f _ A `