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IHC to Complete the First of a Trio for Kazakhstan
01 Dec 2006
The Sliedrecht shipyard of IHC Holland Delta has completed the shallow draft, multi-purpose pusher tug Sarbas for COC of Kazakhstan. Sarbas left the yard for the first time on preliminary builder’s trials on 21 November. At the same time, two sister vessels, Dzhicit and Batyr, were nearing completion in the fitting out hall. All three 31m tugs have been constructed to the IHC Delta Multi-Purpose Pusher Tug 3000 design, derived from a smaller (2500) version, four examples of which were completed recently for Smit Transport Europe BV. One hull was constructed in the Netherlands and the remaining pair in Serbia.
Sarbas and its sisters are in most respects identical to the Smit vessels but longer and with more powerful machinery. The new series has an almost identical hull form, and measure 31.05m in length overall (5m longer than the Smit version), with a moulded breadth of 10.00m and maximum draft of 2.50m at 98% full load. A heavily built hull incorporates a semi-raised foredeck, large ‘push knees’ in the bow and deep tunnels at the stern to accept the propellers and fixed propulsion nozzles. To aid manoeuvrability a 200 Kw bow thruster is fitted in the short rounded stem, requiring a very long transverse tube.
The afterdeck is of a typical ‘mini-anchor-handler’ style, with an open stern and a stern roller with a safe working capacity of 150 tons. A single set of Karm tow pins and line handling fork are fitted just forward of the stern roller and the entire 105 sq/m work deck has the usual protective wooden planking. A hydraulically driven twin drum Kraaijeveld winch with a 70 tons brake holding load is mounted immediately aft of the superstructure. The towing drum, located on the vessel’s centreline, carries 700m of 38mm diameter steel wire rope and is equipped with spooling gear. An anchor handling drum is mounted on the same shaft on the port side and accommodates a 200mm long 44mm diameter work wire. Both drums can achieve a line pull of 50 tons at 7-14m per minute. A Mampaey quick release tow hook is fitted adjacent to the winch for secondary use.
Another item of deck equipment, and particularly important in this type of vessel, is a powerful deck crane. All three tugs have an HS Marine crane, model AKC 185 HE8, capable of lifting 21 tons at an outreach of 5.10m or 9.25 tons at 9.25m.
Each of the trio is powered by two Caterpillar 3512B diesels generating a total of 2,520 bhp (1,878Kw). Power is transmitted to a pair of 2,000mm diameter fixed pitch propellers via Reintjes WAF 873L reverse reduction gearboxes. The propellers turn within fixed nozzles and two semi-balanced rudders are fitted. A bollard pull of 30 tons is specified along with a maximum free running speed of 10 knots.
Two Caterpillar powered auxiliary generators supply electrical power for the vessels, one of 140kVA and the other of 97.5kVA. A further Caterpillar engine powers the fire fighting pump to supply water at 600 cu/m/hr to a pair of monitors located at wheelhouse roof level.
The wheelhouse is equipped with a single central control position with all of the engine and propulsion controls and instruments to hand. A navigational and communications package installed complies with the requirements of GMDSS Area 2. Accommodation is fully heated and air conditioned and has provision for 8 to10 persons in five cabins, with the usual messing and domestic facilities.
By JACK GASTON
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