YTL is a small harbor tug, with steel hull, wood deck house, 66 foot long, 18 foot beam and 5 foot. max. full load draft and is used for towing and mooring small boats and barges.
Its use is limited (due to its size, compartmentation, and limited facilities) to operation in protected waters such as harbors, rivers, etc, Principal compartments consist of pilot house, crew's quarters and engine room.
It is driven by one diesel propulsion engine developing 375 horsepower at its single propeller via a reverse reduction gear and propeller shaft. It is equipped with two 20 kw, 120 volt DC diesel driven generator sets for furnishing electrical power to all electric machinery and equipment.
Galley facilities consist merely of a hot plate and sink in pilot house.
|Fresh Water (Service Tank)||
|Lube Oil (Service Tank)||
|Used Lube Oil||1-1/2 times main engine sump capacity|
|Air Tank (Service Air)||
5 cu ft
|Diesel Oil (Service Tank)(for Main Eng.)||
|Diesel Oil (Service)(for Generator & Boiler)||
PRINCIPAL MACHINERY and EQUIPMENT
Diesel Gen. No. 1
Diesel Gen. No. 2
Air Compressor No. 1
Air Compressor No. 2
Cargo Handling Winch
Hull is steel with wood pilot house.
One 10 man capacity life float complete with two paddles is stored over engine room casing.
One bower anchor, deck and handled by a portable gypsy windlass.
One motor driven fire pump 200 GPM at 80 psi (valve type) serves two 1-1/2" fire plugs (one at each side of the engine room casing) and one 1-1/2" hose valve located in the engine room. Stowage is provided for 50 foot length of 1-1/2" hose, nozzle and spanner wrench at each fire plug.
Engine room is also protected with a fixed C02 system energized from a bank of C02 cylinders.
FRESH WATER SYSTEM
100 gallon gravity tank located on pilot house top supplies fresh water to sink in pilot house and is also used for replenishing water for the fresh water cooling systems of main and generator engines.
Engine Room - Natural supply.
One workbench with vise and grinder is provided in engine room. Locker for potable tools is also provided.
One diesel engine, electric start, fresh water cooled with a built-in reverse, reduction gear (3.74:1 ratio) drives a single shaft and propeller developing about 375 HP at 210 propeller RPM. Reverse gear and speed variation are controlled pneumatically from the pilot house with local control available at the engine. Starting and stopping the engine is done at the engine only.
Electric power is generated from two diesel driven battery start, 20 kw, 120 Volt DC, 2 wire generators which are capable of being operated in parallel. One switchboard with meters, circuit breakers, switches, bus bars, etc. is provided for control and distribution of electric power. One receptacle for shore power connection is provided at the after end of deck house for supplying 100 Amp, 120 Volt DC power to tug when tug is idle. Two batteries, each of adequate voltage to start diesel generator engines are provided. Battery charging circuit from main switchboard is provided. One DC/DC MG set is provided for operation of radio transceiver.
Two lube oil storage tanks each about 145 gallons capacity with hand transfer pump are provided. One used lube oil tank sufficient to hold 1-1/2 times the capacity of the main engine sump is provided to deposit used lube oil.
One service tank (100 gallon capacity) is provided for main engine. One service tank (25 gallon capacity) is provided for generator engines . Hand operated fuel oil transfer pump takes suction from storage tank and discharges into the service tank when replenishment of service tank is required.
Voice communication by means of voice tube is provided between pilot house and engine room.
One radio transceiver is provided for ship to shore or ship to ship (limited range) communication.
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