General: ANDRÉ-B is a conventional tug with open stern for offshore work and anchor
handling and able to take anchors on board. The stern is fitted with a push knee with a Ø800 mm cylindrical rubber fender supplied
by Trelleborg Bakker. She has two propellers in fixed nozzles. Two fishtail-rudders are mounted behind each nozzle, in total four
rudders. Port and starboard rudders can be operated independently. The rudder angle can be up to 75°. The arrangement of the nozzles
is somewhat unusual for a conventional tug. They are hanging free below the hull and extend approx. one meter below the bottom
of the hull. This allows a larger propeller diameter ang gives a better water flow. This arrangement is more common in ASD-tugs.
A heavy round strut is running from the bottom plates to the lower edge of the nozzle as protection against groundings. The double
chine hull has flat strakes between the chines. Bilge keels are fitted between the chines. The bow is ice-strengthened and a
longitudinal stringer provides extra protection against ice-damage. A steel fender runs around the hull. Additional protection
comes from large rubber tyres. ANDRÉ-B is certified for world wide sailing. Two Mitsubishi 16-cylinder-Diesel engines Type S16R-MPTK
provide power for propulsion. The engines have an output of 2x 1,250kW (2x 1,700bhp) at 1,600rpm. Each engine delivers the
power through a Reintjes reversible reduction gearbox type WAF 763 with a ratio of 5.750:1 to the propellers. The propellers with
a diameter of 2.10m were supplied by Van Voorden und run in nozzle type 37 of the same manufacturer. The tug has a maximum speed
of 12.5kts and a maximum conzinous bollard pull of 47.7t. Tank capacities are: 120m3 fuel oil, 25m3 fresh water, sewage tank 7.5m3,
lube oil 2.5m3, and dirty oil 2.2m3. ANDRÉ-B is equipped with a hydraulically driven Verhaar Omega VB-1100-330kW bow tunnel thruster
with 330kW capacity. Two generator sets with Mitsubishi 6D16 diesel engines and Stamford alternators provide 71.5kVA each. A
hydraulic set with a Mitsubishi diesel engine type S6A3 MPTK with 410kW (557hp) provides all needed hydraulic power.
The forecastle deck is at the transition to the main deck raised approx. 1.15m.
The deck carries a hydraulically driven combined anchor and mooring winch supplied by Kraaijeveld. The winch has two cable
lifters for anchor chain with a diameter of 20.5mm, one drum for 20mm nylon mooring rope, and two warping heads. The anchor winch
operates two "high holding power"-type anchors with a weight of minimum 430kg. The chains run through chain stoppers which are
integrated into the winch foundation. Two guide rollers and an assortment of bollards make the anchor and mooring gear complete.
Behind the anchor winch the superstructure is housing the galley, the mess, and a large sanitary space.
The deck is located beneath the forecastle deck and accommodates the crew cabins.
There are two single-bed cabins, each with sanitary space, for the captain and chief engineer. There are two more single-bed and
two two-bed cabins with the sanitary space on forecastle deck. Accommodation and the complete superstructures are air-conditioned.
The hydraulically driven towing winch is mounted behind the superstructure between
the two funnels with exhaust pipes and supply air shaft. The winch was supplied by Maaskant shipyard. It has two independently
operated drums. Hydraulic motors and brakes were supplied by Hägglunds Drives. They are protected by a fibreglass cover. The
maximum pulling power is 45t, the braking force 78t, both in the first layer. The speed is stepless controllable between 0 and 33m/min.
The Hägglunds motors can be switched in a free wheeling mode with up to 600rpm. The two drums are of different length, 920mm and 520mm,
and carry 700m respectively 400m steel wire with a diameter of 38mm. Two hydraulic coupling winches are placed between superstructure
and towing winch. They can be used as tugger winches too. Behind the towing winch is the towing fairlead. The guiding areas are
clad with stainless steel. The starboard post is designed as foundation for the crane and very massive. The crane is a knuckle
boom crane make Heila (Marine Cranes) HLRM 200-4SL with a safe working load (SWL) of 9.5t at the maximum reach of 15.75m. The
crane can be operated with a radio remote control unit. A Mampaey quick-release towing hook with a SWL of 15t is mounted to the
port side post of the fairlead. In front of the port side post, a bit more to the bulwark, a capstan with a pull of 5t at 12m/min
is mounted. Behind the posts of the fairlead horizontal sheeves are placed to guide the coupling wires. The afterdeck is wood
clad between the towing fairlead and the wide stern roller. It has a free space of 120m2 and is equipped with fittings for
two 20' containers. Two towing pins and one fork are placed in front of the stern roller. Two stop pins are installed at the sides
of the rollers. All are hydraulically operated. They are supplied by WK Hydraulics and have a SWL of 30t, the same as the stern roller.
Beneath the accommodation a store with shelves and cold storage with freezers is located.
To the aft it is followed by the engine room. The room contains the main engines, generator sets, hydraulic set, an assortment
of pumps, and a fresh water maker with an output of 3.5m3 in 24 hours. One of the gensets has an extra cooling radiator
for use while in harbour. Next is a store and workshop area. The last compartment contains the hydraulics for the pins and fork
as well as the rudder engines.
It is the next deck above the forecastle deck and carries the wheelhouse. The main control
console is place in the front of the wheelhouse and is designed for one man operation. The console is U-shaped and accessible
by a sliding pilot chair. Hands free communications were achieved by mounting goose neck microphones and foot switches. A second
control console is provided in the aft of the wheelhouse overlooking the afterdeck. It is divided into two panels carrying the
controls for rudders, engines, and winches. A spacious settee with table is placed at starboard beside and aft of the main control
console, a communications console at the port side. The navigation equipment consists among others of two Japan Radio Co. (JRC)
radars, one with ARPA-funktion (Automatic Radar Plotting Aid) and one river radar, echosounder, DGPS, gyrocompass Alphatron Minicourse,
magnet compass by Cassens & Plath, satellite compass by JRC, two auto pilots, AIS system from JRC, and an Alphatron ECDIS- (Electronic
Chart Display and Information System) chart system. The communication equipment is according to GMDSS- (Global Maritime Distress
and Safety System) area A3 standard (world wide) and consists of the following equipment provided by Sailor: two VHF stations
with DSC- (Digital Selective Calling) funktion, one MF/HF station, one VHF station for inland radio telephony, and two Inmersat-C
stations. Additional a GMS cellular telephone, one Mini-M satellite telephone and a JRC Navtex-Receiver are provided.
on the top deck the magnet compass, a number of antennas, the navigation mast, and two 12-person
inflatable life rafts are mounted. The mast carries the two radar antennas, two search lights, the navigation lights, and eight
1,000W flood lights at the top to give ample light for save working in the night. The mast can be tilted down above the lowest
mounted radar antenna to reduce the airdraft.
ANDRÉ-B has a crew of five persons when on 24 hour duty. There are accommodations for a
maximum of eight people.