General: The vessels are ASD tugs with two azimuthing rudder propellers beneath the stern.
The propulsion units are mounted approx. 3.5m from the stern and tilted 5° to get a smaller angle for the universal coupling
and a better performance. The units are Schottel type SRP 1515 FP with fixed pitch propellers of 2.60m diameter in Kort nozzles.
The draught at the propulsion units is about 1.40m larger than the hull’s draught. A large central skeg runs from the bow to
approx. 6.00m from the stern and provides protection in the case of grounding and provides better directional stability. The hull
is equipped with two bilge keels. The Schottels are connected by cardan shafts and modulating twin disk clutches to the ABC type
8DZC main diesel engines. The engines provide 1,945kW (2,645bhp) each at 1,000rpm and are good for a speed of 12kts and bollard
pulls of 66t (tonnes) forward and 63t astern. The tugs are equipped with hydraulically operated bow thrusters providing 2.4t
thrust at 235kW. The tugs have bunker capacities of 97m3 Marine diesel oil and 23m3 fresh water. The tugs
are equipped with Fischcon fire fighting systems according to FiFi1 standards. Two combined step-up gear-pumps sets with a
capacity of 1,380m3/h each and an additional PTO (power take of) are coupled to the front ends of the main engines
and supply 1,200m3/h to each of the two Alco monitors. The remaining pump capacity is used for the deluge system.
Tank top deck:
The deck contains from to stern: Chain locker, store, two double-bed cabins with
en-suite sanitary facilities, laundry and office. Behind these rooms lies the engine room. It contains a separate engine control
room, the two main engines, two Cummins generator sets with an output of 113kVA and two hydraulic unit which are powered as
required by the main engines through the PTO of the fire fighting gear-pump set. Last compartment is the rudder propeller room.
On the raised forecastle is a combined, hydraulically driven anchor and towing is mounted
it was provided by the French company BOPP. The winch has two chain lifters, two warping heads and two towing drums with a
capacity of 400m towing of 48mm diameter. The winch has a pulling power of 18t and a brake power of 150t. In front of the winch
a towing staple with three posts and a cross beam with two fairleads is mounted. The chain stoppers are integrated into the
winch foundation. Behind the winch the superstructure is located. On the forecastle level the two single-bed cabins with en-suite
facilities for captain and chief engineer are arranged side by side. They are followed by the open plan galley and mess room on
the working deck level. A sanitary room is accessible from the working deck. The working deck carries the hydraulically operated
towing winch from BOPP directly behind the superstructure. It has one drum with a capacity of 400m of 48mm diameter wire and
has a pulling power of 18t and a brake power of 150t. A Mampaey towing hook is mounted on the winch foundation. Behind the winch
a H-shaped towing staple with one fairlead is located.
The deck is the roof above the accommodation and is split-level according to the main
deck below. At the aft end a rigid inflatable boat with outboard motor is stores as life boat. Its crane has a SWL of 1t.
In front of the funnels and ventilation shafts stairs lead to the raised part of the boat deck. Between funnels and stairs an
inflatable life raft is mounted on each side of the tug. In front of the wheelhouse an number of hose couplings is placed. Another
five steps lead to the bridge deck.
The deck carries the wheelhouse. Two control consoles are arranged lengthwise with the
captain’s chair on tracks in-between. The wheelhouse has room high windows for better visibility. The navigation equipment is
mostly from Furuno. The VHF system is from Icom.
The wheelhouse roof carries the mast, communication antennas, the magnet compass and two fire fighting monitors.