Vessel | LAUNCH & DELIVERY Contract for fi eld control vessel
ESNAAD 710 has been built by Balenciaga Shipyard for ESNAAD, which provides support vessels for the off shore oil companies and affi liates of Abu Dhabi National Oil Company (ADNOC).
T
he vessel ESNAAD 710 will be engaged in multiple tasks offshore Abu Dhabi, including
traffic control, supply, standby-rescue, fire-fighting, towing, and oil spill response operations. The vessel has a capacity for up to 500 survivors. The craft has been designed and built
in compliance with the requirements of an exhaustive risk assessment programme, as demanded by the vessel operators. ESNAAD 710’s classification is DNV +1A1, Standby (Tropical Area) Vessel, Tug, Fire Fighter I, E0, SF, Clean. The concept design work was
carried out by Vik Sandvik, in close cooperation with the ship owner’s technical and commercial staff. The vessel design stands out by the relatively low freeboard of
the main deck aft,
to facilitate rescue operations. Due to the predominantly gentle weather conditions that are encountered in the Arabian Gulf, the freeboard forward has also been kept relatively low, with a prominent bulbous bow to promote the speed performance of the ship. The accommodation is laid out for
sleeping up to 19 people, plus there is a hospital distributed over two decks, the main deck, and forecastle deck. Above these the field control deck, outfitted with most navigation and communications equipment as per the bridge, and finally the bridge deck. Below decks, the vessel is subdivided
into the bow thruster room, aft of the fore peak, separated by a watertight bulkhead from the laundry and prayer room area, from where access to the switchboard room compartment is possible through a watertight hydraulic sliding door, both locally and remote operated from the wheelhouse. At the aft end of the engineroom there is a further watertight bulkhead,
12 Esnaad 710 multi-task offshore standyby vessel built by Astilleros Balenciaga.
also fitted with a watertight hydraulic sliding door, giving access to the tunnel leading to the transverse thruster and steering gear compartment.
Propulsion All of
the above spaces are flanked
by wing tanks effectively forming a double-hull throughout the length of the vessel. The vessel is driven by four Caterpillar 3516B main engines, each developing 1491kW whilst turning at 1800rev/min. Each pair of engines drives a Finnoy CP propulsion system with ducted propellers, through their two-in-one- out gearbox, with one engine fitted on the forward side of the gearbox and the other aft. With this propulsion combination, the vessel achieved a speed in excess of
14knots on trials. Both forward engines are also arranged for running the fi-fi pumps, via a clutch, and the after engines are direct coupled to shaft generators. Commanding of the engine and
propeller is by means of controls, placed on both the fore and aft consoles in the wheel house. The Caterpillar- supplied engine monitoring panels are duplicated in both the bridge and switchboard room. On the front side of both forward
main engines a fire fighting pump is directly driven through a clutch. Each engine drives a 2700m3
/h Aker
Solutions external fire fighting pump, feeding the 2500m3
/h monitors. The
fi-fi pump is oversized so that the excess water not discharged through the fire fighting monitors will feed the deluge water spray system, with jet nozzles
Ship & Boat International September/October 2008
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