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1 Refrigerating systems are divided into classes, descriptive of the method employed for extracting heat as follows: Direct system is one in which the evaporator is in direct contact with the material or space refrigerated or is located in air circulating passages communicating with such spaces.

Indirect system is one in which a liquid, such as brine or water cooled by the refrigerant, is circulated to the material or space refrigerated or is used to cool air so circulated.

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Unit system is one which has been assembled and tested prior to its installation and which is installed with refrig. erant containing parts completely assembled.

Reserve supply of refrigerant may be stowed in any cool, isolated location (excepting a cargo hold, or passenger or crew spaces) on board the vessel. Racks shall be provided and the containers secured therein. Valve protection cap shall be in place on cylinders.

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Descriptive name of article

Refrigerants, unclassified: Carbon dioxide, solid (dry ice).

Ships' signal and emergency equipment. Cartridges for line throwing appliances.

Distress signal rockets..

Parachute flare distress signal cartridges.

Powder charges for line throwing appliance (mounted-type gun).

Self-igniting pilot lights
(blue flares).
Signals, distress.
(Combination flare and
(Distress lights..
(Rod flares.)

(Smoke signals.)

Water lights..

(Ring buoy flares.)

(Life raft flares.)

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zine chest.

Rockets or shells throwing No label required. Stowage: Vessel's portable maga
stars of any color or descrip-

Approved parachute flare dis-
tress signals with a means
of projecting them, both
contained in a portable
watertight case.
Powder charges used in pro-
pelling lifeline, consisting of
not more than 5 ounces of

powder enclosed in a fabric

A flare signal light used for sig-
naling for a pilot.
Distress signals furnished as
equipment in lifeboats, life
rafts and in pilothouse or
navigating bridge.

No label required. Stowage: In place in the emer

gency and motor lifeboats. Additional flares may be stowed in a location discretionary with the master.

No label required. Stowage: Vessel's portable maga

No label required.

No label required.

zine chest. Container:

Metal cans having watertight top closing means.

Stowage: Vessel's portable magazine chest.2

Stowage: In place within the lifeboat or life raft or buoyant apps. ratus. Additional lights may be stowed in the pilothouse or navigating bridge.

Container: The container shall be constructed in accordance with specification requirements of the Commandant of the Coast Guard.

A cylinder constructed in No label required. Stowage: In place attached to ring
accordance with the reg-
ulations of the Com-
mandant of the Coast
Guard, loaded with a com-
position of calcium carbide
and calcium phosphide de-
signed to produce a brilliant
light, without explosion,
when in contact with water.

buoys, life rafts, and buoyant apparatus as required by Comman dant of the Coast Guard. Spares shall be stowed in vessel's portable magazine chest. Containers: Cylinders built to pecifications of, and approved sby Commandant of the Coast Guard.

1 Container: A watertight metal case constructed of copper of not less than No. 22 B. W. G. thickness, seams lock ointed and soldered. The cover or top may be of cast brass not less than 34" thickness, or of reinforced copper, and shall have a fitted gasket together with threaded means, clamps or dogs to provide a W. T. seal (Bayonet type closing means not permitted). The cover shall be easily removable without recourse to tools. The case shall have a capacity of not less than 6 rockets.

Containers: The container shall be constructed of 18-ounce, or No. 22 B. W G. copper, or equal noncorrodible metal, lock-jointed and soldered, the bottom to be rolled in and soldered. The cover or top of cast brass not less than 8-inch in thickness and 5 inches in diameter shall be so constructed as to be easily removed, and made watertight by a fitted rubber gasket.

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