Military


YRBM - Berthing Barge

YRBM and YRBM(L) are non-self-propelled barges used to provide living accommodations for a submarine or surface ship crew during a submarine or surface ship construction or repair. They contain limited shop facilities to permit ship's force repair work. It is fitted with a storeroom and workshops. All utilities are supplied from the pier. It has a reinforced bow for ocean towing.

The YRBM is 110 foot by 34 foot, and the YRBM (L) is 146 foot by 46 foot. The crafts are reinforced at the bow for ocean towing.

ADMINISTRATIVE DATA

Specifications

YRBM (L) 23 Class specifications for Building Repair, Berthing, and Messing Barge: dated 15 October 1968

YRBM specifications for Building Repair, Berthing and Messing Barge are dated 21 January 1960.

PRINCIPAL CHARACTERISTICS

YRBM

Length

110¢

Beam

34¢

Depth

11¢ -3²

Draft, full load

3¢ -3/8²

Displacement

245 tons

Accommodations - officers

10

CPO

12

Enlisted

78

Propulsion

None

Generators

None

Air Compressors

None

Boilers

None

YRBM (L) 23

Length, overall

146¢

Breadth, molded

46¢

Draft, light

3¢ -2²

Draft, full load

3¢ -8²

Depth, (molded) to deck at side

11¢ -9²

Depth, (molded) to deck at centerline

12¢

Displacement, full load (without margin)

585 tons

Displacement, light (without margin)

498 tons

PRINCIPAL MACHINERY and EQUIPMENT

One 500 pound LWT anchor

One hand operated anchor windlass

HULL, STRUCTURE and FITTINGS

The Craft is built on a longitudinal system of framing. Subdivision of hull provides for watertight bulkheads. Warping, mooring and towing fittings consist of bitts, cleats, closed roller chocks and closed chocks. Two six inch circumference manila mooring lines each 10 fathoms long are provided. One portable gangway is towed aboard.

Hull - Steel

Hull plating

Deck - Steel

Shell - Steel

Structural bulkheads - Butt-welded

Principal Compartments

Berthing spaces

Mesa areas

Lounges

Offices

Medical treatment room

Classrooms

Workshops

Stowage spaces

Special fittings

Bitts, cleats, closed chocks

Towing pads

LIVING

The craft contains living accommodations for personnel as follows:

Crew berthing

CPO berthing

Stateroom

Galley

Crew Mess

Pantry

WR/WC facilities

BERTHING

Officers' staterooms - 26 berths

CPO living space - 30 berths

Crew living space - 201 berths

GALLEY/MESS

One oven, 2-deck

Two griddles

Two fryers, deep fat

Refrigerators

Coffee urns

Mess tables (18)

SANITARY

Crew - 11 water closets, 8 urinals, 10 showers, 15 lavatories

CPO - 3 water closets, 1 urinal, 3 showers, 5 lavatories

Officers - 5 water closets, 2 urinals, 5 showers, 3 lavatories

SAFETY

Fire - One 20 pound dry chemical fire extinguisher in the air conditioning machinery space.

15 pound C02 fire extinguishers installed as follows: one in each workshop, berthing area, medical treatment room, air conditioning machinery space, galley and annex, ship entertainment equipment room, and shore power connection area.

Life Saving - Four life ring buoys

Life jackets

Anchor - One 500 pound LWT anchor; 50 fathoms of 5/8 inch diameter, 6 x 37 galvanized performed improved plow steel wire rope anchor cable; one hand operated windlass.

Drainage - Bottom compartments drained by portable eductor with 10 foot length of 2-inch suction hose.

OPERATION

Propulsion - Non self-propelled

AUXILIARY MACHINERY and FLUID SYSTEMS

Fresh Water - A single 2-1/2 inch fresh water service main for potable fresh water and sanitary flushing system, suitable for shore connection, is installed on the main deck level. A reducing valve set at a pressure of 40 psi (YRBM (L) 23), 35 psi (YRBM) is provided in the potable water system supply line. Hot water is provided by steam coils for showers, lavatories, sinks, dish washing machines, steam kettles and steam table. Cold water serves showers, lavatories, sinks, urinals, water closets and drinking water coolers.

Sea Water - A single 2-1/2 inch salt water service main, suitable for shore connection, is installed on the main deck level. Fire plugs, supplied from the service main, are provided.

Heating - Ventilation duct type (steam) heaters; steam supply line 35 psi to convection heaters.

Ventilation - A refrigerating plant is installed for air conditioning to supply chilled water to fan-cooling coil units. The machinery consists of open type reciprocating compressors, each driven by a 440 volt, 3 phase, 60 cycle motor, refrigerant condensers, and water chillers.

Compressed Air - Shore connections or air supply (50 cubic feet at 100 psi) to shop areas and laundry. Outlets in workshops are provided with orifices to reduce service pressure to 25 psi.

ELECTRICAL

Shore power - 450 volt, 3 phase, AC shore connection, ungrounded type; electric power for the 450 volt, 3 phase, 3 wire, 60 cycle system is supplied from one 400 ampere shore power receptacle.

Distribution Panels

One twelve circuit 450 volt, 3 phase, 60 hz main power distribution panel with a 400 ampere main circuit breaker.

One fourteen circuit 120 volt, 3 phase, 60 hz main lighting distribution panel.

A bank of three single phase transformers, 450 volt are installed near the main distribution panel for 120 volt power and lighting equipment.

Special Lighting - Ten floodlights, 300 watt

COMMUNICATION

Interior communication

Central amplifier type general announcing system to transmit information to all areas of the barge.

Circuit J - Dial Telephone System for communication between stations on the barge and a shore dial telephone system.

MISCELLANEOUS

SHOPS

Electrical workshop

A silicon rectifier, with a rating of 5 kw, 450 volt, 3 phase, 60 cycle, AC input and 125/250 volts DC output is provided for test receptacles.

22 feet of workbenches with three 3-inch, swivel base, bench and pipe vises.

Electronic workshop - 24 feet of electronic workbenches with three 3-inch bench and pipe, swivel base vises

Machine Shop - 26 feet of workbenches with two 6 inch, one 4-1/2-inch, and two 3 inch bench and pipe swivel base vises, engine lathe, drill press, milling machine, power hacksaw, tool grinder, and arbor press.



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