Damen Shipyards, headquartered in The Netherlands, has just secured an order for no less than fourteen ship-handling tugboats from the Kuwait Oil Company (KOC) nine of them to their latest ASD TUG 3212 design, and five to their better-known 2810 design.
The new 3212 tugs, designed to push, pull and tow, will be assisting tankers at nearshore loading terminals and will also be equipped with a powerful fire-fighting system for station at the new single point moorings further offshore Kuwait.
These vessels, due for delivery from Damen Shipyards Galati in Romania in 2014, have been tailored to meet KOC’s requirements, but the design features of Damen’s standard version of the optimised model 3212, with its stronger 80 ton bollard pull are the focus here.
Damen Shipyards ASD TUG 3212:Image courtesy Damen Shipyards
New Hull Form
At 32.70m in length overall, 12.82m beam, a draft aft of 5.6m and a displacement of approximately 800 tons the ASD Tug 3212 has a completely revised hull form compared to previous vessels as a result of tests at Damen’s own R&D facility, as well as at the Maritime Research Institute Netherlands (MARIN). The result is a revolutionary new hull form for improved manoeuvrability.
A pronounced ‘V’ shape in the fore-ship combined with a high raised forecastle, ensures a relatively dry working deck. Other important design features include good dynamic stability, a deep skeg, bilge keels and relatively low wheelhouse position to ensure low accelerations for increased comfort, safety, and sea keeping performance. Crew accommodation is to a high standard.
Power & Propulsion
The standard ASD Tug 3212 is fitted with two Caterpillar 3516C HD TA/D main engines generating a total of 5,050 bkW (6,772 bhp) at 1800 rpm and they give very quick acceleration to a maximum transit speed of 14 knots. Emission figures for this engine comply with EPA and IMO Tier 2 rules.
Each main engine is coupled to a Rolls Royce US 255CP fully azimuthing propulsion unit via a relatively straight shaft line with bow tooth couplings. The units incorporate 2,800 mm diameter controllable pitch propellers, turning in nozzles lined with stainless steel for long-term service.
ASD Tug 3212 Engine Room Detail: Photo courtesy of Damen Shipyards
The Hybrid Option
Damen is well aware of the need to make fuel savings and to cut back on emissions. Consequently, they say they are building a hybrid option of the ASD Tug 3212, which will be available from stock and can be delivered with a combined hybrid generator/firefighting diesel.
The generator set supplies the power to two electric motors in the drive shafts which allows the tug to sail at a speed of 7 knots on electric power in transit modes. In this way it is possible to reduce emissions and fuel consumption by more than 25 %.