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CODE OF FEDERAL REGULATIONS – TITLE
33 – NAVIGATION AND NAVIGABLE WATERS
PART 183—BOATS AND ASSOCIATED
EQUIPMENT
Subpart F—Flotation Requirements
for Inboard Boats, Inboard/Outdrive Boats, and Airboats
Source: CGD 75-168, 42 FR 20243, Apr.
18, 1977, unless otherwise noted.
Sec. 183.101—Applicability
This subpart applies to monohull inboard boats,
inboard/outdrive boats, and airboats less than 20 feet in
length, except sailboats, canoes, kayaks, inflatable boats,
submersibles, surface effect vessels, amphibious vessels,
and raceboats.
[CGD 75-168, 42 FR 20243, Apr. 18, 1977,
as amended by USCG-1999-5832, 64 FR 34716, June 29, 1999]
Sec. 183.105—Quantity of flotation
required
(a) Each boat must have enough flotation to
keep any portion of the boat above the surface of the water
when the boat has been submerged in calm, fresh water for
at least 18 hours and loaded with:
(1) A weight that, when submerged, equals
two-fifteenths of the persons capacity marked on the boat;
(2) A weight that, when submerged, equals
25 percent of the dead weight; and
(3) A weight in pounds that, when submerged,
equals 62.4 times the volume in cubic feet of the two largest
air chambers, if air chambers are used for flotation.
(b) For the purpose of this section, “dead
weight” means the maximum weight capacity marked on
the boat minus the persons capacity marked on the boat.
Sec. 183.110—Definitions
For the purpose of this subpart:
Bilge means the area in the boat, below a height
of 4 inches measured from the lowest point in the boat where
liquid can collect when the boat is in its static floating
position, except engine rooms.
Connected means allowing a flow of water in
excess of one-quarter ounce per hour from the engine room
bilge into any other compartment with a 12 inch head of water
on the engine room side of the bulkhead.
Engine room bilge means the area in the engine
room or a connected compartment below a height of 12 inches
measured from the lowest point whereliquid can collect in
these compartments when the boat is in its static floating
position.
Engine room means the compartment where a permanently
installed gasoline or diesel engine is installed, including
connected compartments.
Open to atmosphere means a compartment that
has at least 15 square inches of open area directly exposed
to the atmosphere for each cubic foot of net compartment volume.
Sealed compartment means an enclosure that can
resist an exterior water level of 12 inches without seepage
of more than one-quarter fluid ounce per hour.
[CGD 77-145, 43 FR 56858, Dec. 4, 1978,
as amended by CGD 82-010, 48 FR 8273, Feb. 28, 1983; CGD 85-098,
52 FR 19728, May 27, 1987; CGD 96-026, 61 FR 33670, June 28,
1996; USCG-1999-5832, 64 FR 34716, June 29, 1999; USCG-1999-5151,
64 FR 67176, Dec. 1, 1999]
Sec. 183.112—Flotation material and
air chambers
(a) Flotation materials must meet the requirements
in Sec. 183.114 as listed in Table 183.114 when used in the:
(1) Engine room bilge, (2) engine room, or (3) bilge, unless
located in a sealed compartment.
(b) Air chambers used to meet the flotation
requirements of this subpart must not be integral with the
hull.
[CGD 77-145, 43 FR 56859, Dec. 4, 1978;
44 FR 47934, Aug. 16, 1979]
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