Rule 6. (1) The capacity tag shall contain the weight capacity of the watercraft
determined as hereinafter provided.
(2) The weight capacity of a watercraft for use with an outboard motor, except a
watercraft dependent solely upon the buoyancy of pontoons or similar flotation
devices, shall be determined by either of the following methods:
(a) The formula WC=7 1/2 LBD, where WC is the weight capacity in pounds, L is the
centerline length, B is the maximum beam amidships, and D is the effective depth
figured from keel to lowest freeboard.
(b) Reference to the manufacturer's capacity tag installed in a watercraft if
manufactured or offered for original sale in this state on or after January 1, 1968, or in
accordance with standards approved by the state waterways commission.
(3) The weight capacity of a watercraft with a permanently installed engine, except
watercraft dependent solely upon the buoyancy of pontoons or similar flotation devices,
shall be determined in the same manner as for watercraft for use with outboard
motors, except that the weight of all machinery and associated operating gear
including battery, fuel, and fuel system shall be subtracted.
(4) The weight capacity of a watercraft dependent solely upon the buoyancy of
pontoons or similar flotation devices shall be determined by applying the formula
WC=[(62 1/2V)--Boat Wgt.] : 2, where WC is the weight capacity of the watercraft,
and V is the volume of both pontoons. If equipped with a permanently installed
engine, the weight of all machinery
and associated operating gear including battery, fuel, and fuel system shall be
subtracted from the weight capacity.
(5) The weight capacity of a rowboat and any other watercraft for use without an
outboard motor shall be determined in the same manner as for a watercraft for use with
an outboard motor, following the formula expressed as WC=7 1/2 LBD.
(6) The weight capacity of a canoe shall be determined by the formula WC=7 1/2
LBD x 2.
(7) The livery operator shall provide the inspecting officer with information
relative to the weight of the watercraft either by reference to the manufacturer's rating or
by actual weighing of the watercraft.
History: 1979 AC.
R 281.517 Horsepower capacity.
Rule 7. The horsepower capacity of an outboard watercraft, excepting canoes or
pontoon craft, shall be determined by either of the following methods:
(a) The horsepower capacity of an outboard watercraft, other than a canoe, and
except one dependent solely upon the buoyancy of pontoons or similar flotation
devices, shall not exceed the value given by the boat horsepower table in figure 1.
The horsepower capacity of an outboard watercraft, other than a canoe, and
dependent solely upon the buoyancy of pontoons or similar flotation devices shall not
exceed the value given by multiplying the cubic feet of flotation in the pontoons by
the pontoon length in feet and dividing by the pontoon diameter in inches. If the
pontoons are not circular in cross section, the diameter of the largest circle that can be
inscribed in the pontoon shall be used.
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