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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