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CODE OF FEDERAL REGULATIONS – TITLE
33 – NAVIGATION AND NAVIGABLE WATERS
PART 183—BOATS AND ASSOCIATED EQUIPMENT
Subpart G—Flotation Requirements
for Outboard Boats Rated for Engines of More Than 2 Horsepower
TESTS
Sec. 183.225—Flotation test
for persons capacity
Flotation standard. When the conditions prescribed
in Sec. 183.220 are met, the boat must float in fresh, calm
water as follows:
(a) The angle of heel does not exceed 10 degrees
from the horizontal.
(b) Any point on either the forward or aft reference
area is above the surface of the water.
(c) The reference depth at the reference area
that is opposite the reference area that is above the surface
of the water is 6 inches or less.
Sec. 183.230—Stability test
(a) Flotation standard. When the conditions
prescribed in Sec. 183.220 (a), (d) through (h) and paragraphs
(b) and (c) of this section are met, the boat must float in
fresh, calm water as follows:
(1) The angle of heel does not exceed 30 degrees
from the horizontal.
(2) Any point on either the forward or aft
reference area is above the surface of the water.
(3) The reference depth at the reference area
that is opposite the reference area that is above the surface
of the water is 12 inches or less.
(b) Quantity of weight used. Load the boat with
a quantity of weight that, when submerged, is equal to the
sum of the following:
(1) One-half of the quantity of weight
required by Sec. 183.220(b)(1).
(2) The quantity of weight required
by Sec. 183.220(b)(2).
(c) Placement of quantity of weight: starboard
side. Place the weight required by paragraph (b) of this section
in the boat so that:
(1) The quantity of weight required by Sec.
183.220(b)(2) is positioned in accordance with Sec. 183.220(c);
and
(2) One-half the quantity of weight required
by Sec. 183.220(b)(1) is uniformly distributed over a distance
along the outboard perimeter of the starboard side of the
passenger carrying area that is equal to at least 30 percent
of the length of the passenger carrying area so that the
center of gravity of the quantity of weight is located within
the shaded area illustrated in Figure 12, the center of
gravity of the amount of weight placed on the floor of the
boat is at least 4 inches above the floor, and the center
of gravity of the amount of weight placed on a seat is at
least 4 inches above the seat. The location and dimensions
of the shaded area are as follows:
(i) The shaded area is centered at the mid-length
of the passenger carrying area;
(ii) The length of the shaded area is equal
to 70 percent of the length of the passenger carrying
area; and
(iii) The breadth of the shaded area is
6 inches from:
(A) For weights placed on the floor, the
outboard perimeter of the passenger carrying area; and
(B) For weights placed on a seat, a vertical
line inside the passenger carrying area as illustrated
in Figure 13.
(d) Placement of quantity of weight: port side.
The quantity of weight required by paragraph (b)(1) of this
section is placed along the port side of the passenger carrying
area in accordance with the conditions prescribed in paragraph
(c)(2) of this section.
Sec. 183.235—Level flotation test
without weights for persons capacity
When the conditions prescribed in Sec. 183.220
(a) and (d) through (h) are met, the boat must float in fresh,
calm water as follows:
(a) The angle of heel does not exceed 10 degrees
from the horizontal.
(b) Any point on either the forward or aft reference
area is above the surface of the water.
(c) The reference depth at the reference area
that is opposite the reference area that is above the surface
of the water is 6 inches or less.
[CGD 77-145, 43 FR 56859, Dec. 4, 1978,
as amended by USCG-1999-5832, 64 FR 34716, June 29, 1999]
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