1176 SIXTY-THIRD CONGRESS. sm. III. cH. 153. 1915.
a, b, c, d, e denote the horizontal breadths of the boat measured in
feet at the upper and lower oints of the depth and at the three points
obtained by dividing h into fdur e ual parts (a and e being the breadths
at the extreme points, and c at the middle point, of hl.
Third. If the sheer of the gimwale measured at the two points
situated at a quarter of the length of the boat from the ends, exceeds
one er centum of the length of the boat, the depth emdployed in
calcisating the area of the cross sections A or C shall be eemed to
be the depth amidships plus one per centum of the length of the
boat.
Fomth. If the de th of the boat exceeds forty-five per
centum of the breadlth, the depth employe in calculating the area
of the midship cross section B shall be deemed to be equa to forty-
five per centum of the breadth; and the depth emplo ed in calculating the areas of the quarter-length sections A and 5 is obtained
b increasing this last Hgure by an amoimt equal to one per centum
of the length of the boat, provided that in no case shall the depths
em lo ed 111 the calculation exceed the actual de ths at these pomts.
Fifth. If the de th of the boat is greater than fldur feet, the number
of persons given by the qpplication of this rule shall be reduced in
roportion to the ratio of our feet to the actual depth until the boat
has been satisfactorily tested afloat with that number of persons
on board all wearing life jackets.
Sixth. The Boar of Supervising Inspectors shall im , by
suitable formulae, a limit for the number of persons allowed in boats
with very fine ends and in boats very full in form.
M¤¤•¤*•I ¤¤¤¤1>¤- Seventh. The Board of Supervising Inspectors may by regulation
assign to a boat a, cayiacity equal to the product of the length, the
breadth, and the dept multiplied by six-tenths if it is evident that
this formula does not °ve a greater ca acit than that obtained by
the above method. 'lge dimensions shhll then be measured in the
follo manner:

From the intersection of the outside of the planking with

the stem to the corresponding point at the sternpost or, in the case of a square-sterned boat, to the afterside of the transom. Breadth. From the outside of theplanking at the point where the breadth of the boat is greatest. Depth. Amidships inside the planking from the keel to the level of the gunwale, but the depth used in calculating the cubic capacity maiyl not in any case excec forty-five per centum of the breadth. _ all cases the vessel owner has the right to require that the cubip capacity of the boat shall be determined by exact measuremen . Eighth. The cubic capacity of a motor boat is obtained from the gross capacity by deducting a volume equal to that occupied by the motor and its accessories. D•¤k¤¤•~ mzéx anna or roxroon soars AND ormv noxrs or rm; szcoim cuss. P°”‘°°“ "°°"· First. The area of the deck of a pontoon boat of t 1C, 2B, or 2C shall be determined by the method indicated belog: or by any other method giving the same degree of accuracy. The same rule is to be qpplied in determining the area within the fixed bulwarks of a boato the 2A. Secomllp For example, the surface in square feet of a boat may be deemed to be given y the following formula: Area=-%§(2a+1.5b+4c+1.5d+2e),