A. Main Characteristics:
Length overall 38.7 m ( 127 feet)
Beam 8.08 m ( 26.5 feet)
Molded depth 4, 33 m ( 14.2 feet)
Draft, average half load 2, 1 m ( 6.9 feet)
Displacement 220 Tons
Engines 2 x Caterpillar C32 Acert
Power 100% MCR 2 x 1800 bhp at 2300 rpm
Maximum speed at half load 17 knots
Continuous Cruising speed 14 knots
Range at 10 knots 3500 n.m.
Gross tonnage approx. 340 GT
Tanks capacity, 100% filled, will be approximately the following:
Fuel oil, main and daily tank m3 23,00 (6,076 gallons)
Fresh water tanks m3 5,00 (1,322 gallons)
Black waters m3 1,50 ( 264 gallons)
Grey waters m3 1,50 ( 264 gallons)
Lube clean oil tank m3 0,35 ( 92.5 gallons)
Lube dirty oil tank m3 0,35 ( 92.5 gallons)
Overflow tankm3 m3 0,35 ( 92.5 gallons)
Bilge oily water m3 0,70 ( 185 gallons)
C. Acceptable Noise Levels:
Vessel moored along the quay, air conditioning system at half power, and one generator running:
closed accommodations spaces 52 dba
aft decks 55 dba
forward deck 53 dba
Economical speed - 14 knots
Forward Owner’s cabin 54 dba
Aft guest cabins 56 dba
Twin Guest Cabin 54 dba
Main deck saloon 58 dba
Upper deck saloon 56 dba
In any case within the limit of the RINA comfort class.
D. Model tank test:
The hull form has been optimized during the model tank test that has been done at Dalian University of technology tank test basin.
The following tests have been performed:
Resistance test, bare hull, at three displacements, speed range 4-22 knots every two knots.
Resistance test hull with spray rails, three displacements, speed range 4-22 knots, every two knots.
E. Anchor Windlass:
Two vertical type anchor windlasses, model Maxwell VWC 6000, 4000w, two speeds, stainless steel gipsy wheel suitable for U2 class stud link chain, 16 mm diam, and capstan drums, powered by a three-phase electric motor will be installed.
Two capstan drums 2200w,. single speed, double direction, at least 1300 Kg bollard pull and 10 m/min speed, will be installed, one on each side of the aft main deck.
The electric motors will be installed in the aft peak.
The warping lines to be controlled by foot switches located as suggested by the Captain.
In the way of capstan foundations, the deck shall be properly reinforced
G. Anchor chain:
Two high holding power galvanized steel anchors or similar, will be provided. They will be connected to 2 x 400 feet (125 meters) length galvanized chains 16 mm with stud, grade 2, and they will be complete with shackles and swivels. Anchors and chains will be in compliance with the Classification Society’s requirements.
The last link of chain will be securely fastened in the chain locker and will be provided with an emergency release control for both anchors.
Chains shall be painted according with international rules or particular captain’s request, in order to valuate the quantity of chain overboard.
The shipyard will supply four nylon mooring lines of the highest quality available, length at least 30m each; each line will have at its end an eye with a stainless steel chain.
H. Main engines:
The Builder will install 2 diesel engines Caterpillar C 32 Acert, rating E, power about 1.400kW (1.800 HP) at 2.300 rpm, coupled to reduction gears.
The Main Engine color will be white; they will be mounted on elastic joints;
Engines and reduction gears will be coupled by means of suitable elastic joints, in order to reduce any vibration, if any.
I Reduction gears:
Two marine reduction gears, ZF 3050 type, with gear ratio 3:1 approx will be installed.
They will be mounted on elastic thrust bearings support, rigidly connected to the propeller shaft and elastically to engines.
J. Elastic coupling:
The main engines will be coupled to the reduction gear by flexible join Vulcan type or equivalent.
K. Propeller shaft:
Stuffing box’ seals will be of “Axi Seal” ceramic type or similar; shall be connected to the stern tube.
Propeller shafts will be special stainless steel Duplex 4462 rigidly coupled to the reduction gears’ flanges.
Calculations on torsional vibrations will be submitted to the Classification Society for approval.
Outward rotating, 5-blade hi skewed propellers of diameter approx mm 1.180, pitch 1135, will be installed.
The propellers will be in Nibral, a bronze, nickel and aluminum alloy.
The coupling on the shaft will be cone with key.
Propellers shall be balanced in order to avoid any vibration and relevant noise to be transmitted to the hull structure
Two Northern Lights generators will be installed. Each will consist of one diesel engine feeding a three-phase generator approx. 90 kW at 1500 rpm.
The engine and the generator will be elastically coupled on common base.
They will be equipped and connected with the following systems:
- Fresh water cooling system, with incorporated fresh water pump, self priming sea water pump, thermostat and heat exchangers.
- Fuel system with feeding pump and duplex filter.
- Lube oil system with incorporated oil cooler, duplex filter and lubricating pump.
- Exhaust integrated system, with separation between gases and water, in order to reduce as much as possible the noise, mainly when moored in the harbor
clean/dirty oil transfer system
- 24V starter motor.
The generators will be placed in a sound-proof box; the generators’ soundproof boxes will allow easy access for inspection and maintenance operations.
All piping will have elastic couplings.
Standard instrument panels will be installed on engines.
N. Bow thruster:
One transversal propeller will be installed at the bow. It will be a two fixed pitch counter rotating propellers, 530mm propeller diameter CMC BTM 7-2p series, 65 KW power absorption, and thrust of at least 1.150 Kg.
It will be supplied via a frequency converter for the proportional control of the power transmitted to the propeller.
The propeller will be driven by an electric motor of suitable power, with incorporated brakes to keep the propeller perfectly still when it is idle.
The transversal tunnel will be in fiberglass of suitable thickness.
Control joy-sticks will be placed in the wheelhouse and in the outside wings steering stations.
It will be also fit a control to put in parallel two generators before using bow thruster.
O. Fin stabilizer:
A non-retractable stabilizer fins system will be installed and will consist of:
- x plate complete with two hydraulic cylinders and stainless steel shafts
- 1 x electro hydraulic power unit
- x fins
- 1 x CMC sensor package with control panel
Fins will be designed to damp 90% of the rolling at a speed of 16 knots.
Stabilizers will be CMC model 20 MP 2140 with 2 x 1,4 m2 (21 sq. ft) composite fiberglass fin with NACA 0015 profile.
When the engines are put in reverse, the fins will be automatically turned in neutral position and locked.
All the hull structures that are part of foundations and hull openings will be according to the manufacturer’s instruction and in compliance with the Classification Society’s requirements.
The hull plate with hydraulic cylinders will be fitted in a watertight recess, with bilge suction and alarm.
Fins will be installed in such a way so they do not exceed the maximum beam of the yacht.
The CMC control system will allow the fins to operate also with the boat at anchor (zero-speed stabilizers).
P. Air conditioning system:
A complete air conditioning system will be supplied.
The design conditions are as per below:
External condition Internal condition
Temperature Humidity Temperature Humidity
Summer 100.4 °F 80% 73.4 °F 50%
Winter 33 °F - 71.6 °F 50%
Max temperature of sea water at condenser +80.6 °F
Min temperature of sea water at condenser +37.4 °F
The system is type water to water and it is constituted by cooled water, heat pump type, with refrigerant gas R 407c.
The system is based on three compressors, identical and independent, with possibility of exclusion of every each circuit.
They will be hermetic scroll type.
The chiller is equipped with a control panel, but in normal operation command and check of the system happens directly by a remote control unit fitted in wheel house.
It will be placed in the garage with separate sea water inlet and outlet; sea water piping shall be CuNi.
The chilled is condensed with sea water by means of exchanger built in titanium.
The central of conditioning is designed so that the chiller is automatically loaded in proportion to the thermal request; the system can always be in function, also in case of breakdown or still in maintenance of one compressor.
The total cooling capacity is more than 400.000 BTU
Q. Generators system:
The generators system will consist of two main marine diesel generators, about 90 kW each - 400V - 50 Hz. with electric starter
Each main generator is standing by for the other and they can work in parallel.
The panel of each generator will be provided with all the instruments to start and control the diesel generator and breakers shall be primary producer.
The generators will be brushless, IP 23 protection, F insulation class
Load transfer, load sharing and parallel between generators and shore power shall be managed by the monitoring system.
FULL BUILDERS SPECIFICATIONS AVAILABLE UPON REQUEST.