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CODE OF FEDERAL REGULATIONS – TITLE
33 – NAVIGATION AND NAVIGABLE WATERS
PART 183—BOATS AND ASSOCIATED EQUIPMENT
Subpart H—Flotation Requirements
for Outboard Boats Rated for Engines of 2 Horsepower or Less
Source: CGD 75-168, 42 FR 20245, Apr.
18, 1977, unless otherwise noted.
GENERAL
Sec. 183.301—Applicability
(a) This subpart applies to monohull outboard
boats that are:
(1) Less than 20 feet in length; and
(2) Rated for manual propulsion or outboard
engines of 2 horsepower or less.
(b) This subpart does not apply to sailboats,
canoes, kayaks, inflatable boats, submersibles, surface effect
vessels, amphibious vessels, and raceboats.
[CGD 75-168, 42 FR 20245, Apr. 18, 1977,
as amended by USCG-1999-5832, 64 FR 34716, June 29, 1999]
Sec. 183.302—Flotation requirements
Each boat to which this subpart applies must
be manufactured, constructed, or assembled to pass the stability
and flotation tests prescribed in Secs. 183.325(a), 183.330(a),
and 183.335(a).
Sec. 183.305—Passenger carrying area
(a) For the purpose of this section, a boat
is level when it is supported on its keel at the two points
shown in Figure 2.
(b) As used in this subpart, the term “passenger
carrying area” means each area in a boat in which persons
can sit in a normal sitting position or stand while the boat
is in operation. Passenger carrying areas are illustrated
in Figures 3 through 8.
(c) The length of each passenger carrying area
is the distance along the centerline of the boat between two
vertical lines, one at the forward end and one at the aft
end of the passenger carrying area, when the boat is level,
as illustrated in Figures 3 and 4. For boats with a curved
stem inside the passenger carrying area, the forward vertical
line is where a line 45 degrees to the horizontal when the
boat is level is tangent to the curve of the stem, as illustrated
in Figure 5. For boats with cabins, the forward vertical line
is where there is a minimum distance of two feet between the
inside top of the cabin and the water line formed when the
boat is swamped and loaded with weights under Sec. 183.320
as illustrated in Figure 6.
(d) The breadth of the passenger carrying area
is the distance beteen two vertical lines at the mid-length,
excluding consoles, of the passenger carrying area when the
boat is level as illustrated in Figures 7 and 8. For boats
with round chines inside the passenger carrying area, the
vertical line is where a transverse line 45 degrees to the
horizontal is tangent to the arc of the chine, as illustrated
in Figure 7.
[CGD 75-168, 42 FR 20245, Apr. 18, 1977;
42 FR 24738, May 16, 1977]
Sec. 183.310—Reference areas
(a) The forward reference area of a boat is
the forwardmost 2 feet of the top surface of the hull or deck
as illustrated in Figure 9.
(b) The aft reference area of a boat is the
aftmost two feet of the top surface of the hull or deck, as
illustrated in Figure 9.
Sec. 183.315—Reference depth
Reference depth is the minimum distance between
the uppermost surface of the submerged reference area of a
boat and the surface of the water measured at the centerline
of the boat, as illustrated in Figure 10. If there is no deck
surface at the centerline of the boat from which a measurement
can be made, the reference depth is the average of two depth
measurements made on opposite sides of, and at an equal distance
from, the centerline of the boat.
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