General: The tugs of the Fairmount class are conventional deep-sea tugs with an open stern,
making them suitable for anchorhandling work. They are equipped with two propellers in fixed nozzles and a conventional rudder
behind each nozzle. The hull is built with a frame spacing of 600mm. From forward to aft the hull is divided into fore peak,
bow thruster's compartment, refrigeration machinery room, engine room, aft fuel tank area, steering gear compartment, and aft peak.
The tugs are powered by four Wärtsilä W 6L 32 engines delivering 4x 3,000kW (4x 4,080bhp) at 750rpm. The engines use
Intermediate Fuel Oil (IFO), in this case IFO180. It is mixed from Heavy Fuel Oil (HFO) and Marine Diesel Oil (MDO) or Marine
Gas Oil (MGO) to get the required viscosity. The engines drive two four-bladed 3.85 m diameter controllable pitch propellers
through Wärtsilä ´twin in-single out´ gearboxes with a 4.84:1 reduction. The propellers are running in fixed Lips HR-nozzles.
The tugs have a free-running speed of 16.5kts. The maximum continous bollard pull was 200t and 205t at 110% MCR on trials.
The tank capacities are: 539m3 diesel fuel, 2,201m3 intermediate fuel oil (IFO180), and 216m3 potable water. This gives an
endurance of approx. 40 days of continous towing. The tugs are equipped with one bow thruster with 825kW output delivering
12.5 tonnes of thrust. The stern thruster has an output of 736kW delivering 10.5 tonnes of thrust. Both are from Nakashima
Propeller Co. Ltd. The tugs are equipped with a fire-fighting system according to FiFi1 standard. Two Kumera fire-fighting
pumps are coupled to the foreward end of two main engines delivering each 1,200m3/h. The pumps supply water to two monitors
and the water curtain self-protection system by Fire Fighting Systems (FFS) of Norway. The main engines additionally drive two
shaft generators by means of gearbox power take-of's. Additionally there are two Caterpillar driven generator sets rated at 370kW,
and a Caterpillar emergency generator set at 99kW.
On this deck from forward to aft are placed: the bow thruster, the sewage treatment
plant, two generator sets, the main engines, tanks, the stern thruster, and the steering gear room. The engine control room is
located against the bulkhead between sewage treatment compartment and engine room. Below is the double-bottom with it's tanks.
On this deck from forward to aft are placed: the bow thruster motor, refrigeration
machinery room, exhaust uptakes, (offshore)-chain lockers, floor opening above main engines, and tanks. In front of the tanks
emergency exits are located on both of sides of the ship. Behind the tanks are the stern thruster motor and the steering gear
room. Both are accessible by a tunnel beneath the tanks.
The crew mess, the officer's mess and the recreation room are placed here behind the fore
peak on the port side. Behind, between hull and winch room, the air handling unit (AHU) compartment, a salvage store and work
shop, and a paint store are fitted. The starboard side houses the galley, the provision store, cooler and freezer rooms, laundry,
and a common toilet. Behind, between hull and winch room, a change room, the CO2-room, and a deck store are located. The winch
room houses an electro-hydraulic waterfall type winch with three drums. On the lower level two towing drums holding 1,500m x 76mm
towing wire are fitted. On the upper level one anchorhandling drum with the same capacity is installed. It is only fitted with
300m x 76mm working wire to take advantage of the maximum pulling power in the first layer. The lower drum shaft carries non-declutchable
gypsies for chains up to 3,5" diameter on each side. All drums are declutchable. The winch was provided by Kitagawa Kogyo and
has a brake capacity of 400t and a pulling power of 250t. A heavy duty towing crucifix supports the sheet-metal covering of
the winch room's back wall. The 384m2 wood-sheated aft deck is fitted with offshore type cargo barriers. In front of the winch
room two tugger winches with a pulling power of 10t are fitted, one each on starboard and port sides. They as well as the two
capstans at the stern were provided by Kitagawa Kogyo too. In front of the stern roller (5,40m x 2,30m diameter) are two
hydraulic vertical towing pins with 200t safe working load (SWL) and a hydraulically operated shark jaw with 300t SWL fitted.
All were supplied by Plimsoll, manufactured to a Smith-Berger, Norway, licence.
It is completely surrounded by the hull and one winch room wall. Only to starboard
and port sides of the winch room are small deck strips where three inflatable life rafts for 2 x 20 and 1 x 16 persons are mounted.
Additionally at starboard two spare propeller blades are mounted. In the bow a large bosun's store is fitted. Behind it is the
crew accommodation. There are five 4-bed cabins at the outside and one in the center of the deck. At starboard the hospital is
situated behind two cabins. It has one bed and it's own sanitary space, a desk and lockers. The cabins have 2x 2 stacked beds,
a settee, a desk, and four lockers. In the center is a common sanitary space.
Upper Forecastle Deck:
From port to starboard one single-bed cabin, two two-bed cabins with stacked
beds, and another single-bed cabin are fitted. Behind an athwarth corridor another two-bed cabin is located at port and a conference
and office room at starboard. Aft of these rooms the emergency generator room and a store are fitted. They are accessible from
the aft part of the deck. The forecastle carries a Kitagawa Kogyo anchor winch with two gypsies and two warp heads, and the chain
stoppers. Additionally a Smit-brackett is mounted. Two Plimsoll hydraulic slewing cranes are mounted at the aft end of the deck
on either side. The port crane has a SWL of 8t at 7m outreach and of 1.5t at 9.5m to handle the m.o.b. boat. The starboard crane
has a SWL of 8t at 7m outreach and handles the work boat. Both boats are rigid hull inflatables. Two small and one large storage
winches are mounted between the cranes. The large one holds 1,500m x 76mm spare towing wire, the two small ones carry pennant
wires. These winches are also from Kitagawa Kogyo.
Two single-bed suites for Captain and chief engineer are located at the foreward
bulkhead of the superstructure. They consist of day cabin, bed room, and sanitary space. Behind a corridor two single-bed cabins
with own sanitary space are fitted. In the center is a distribution board room.
A steel-grid catwalk leads around the wheelhouse. The main control desk is mounted against
it's foreward bulkhead. The desk contains beside the traditional wheel a joystick which can control rudder, main engines, and
thrusters simultanously using the Lipstronic control system by Lips-Wärtsilä. At the aft bulkhead a second control desk overlooking
the aft deck is fitted, additionally controlling the winches. At port is a radio station desk and at starboard a chart table.
In the center of the room a communication desk and a work table are placed beside the staircase. Settees are fitted at both side bulkheads.
The greater part of the navigation and communication equipment was provided by Furuno. Some exceptions are the gyro compass and
the autopilot which are from Tokimec. The equipment contains among others two radar systems, DGPS navigation data recorder,
AIS, and communication gear according to GMDSS area 3 standard including MF-, HF radio as well as Inmarsat C and F.
It carries four search lights, the magnet compass, and the satellite communication antenna.
The platform builds a bridge between the two stacks. It carries the mast and the two remote-controlled FFS-monitors.
The tugs have a regular crew of 12 persons. Accommadation is available for 36 persons so that
additional personnal can board according to the job requirements. The superstructure is fully air conditioned.