Wärtsilä reveals new AHTS design

Offshore staff

HELSINKI, Finland – Wärtsilä is showing a new anchor handling tug supply (AHTS) vessel design that it says focuses on simplicity, efficiency, and reduced environmental impact. The new series designs features bollard pull options of 180 metric tons (198 tons), with options for 150 or 220 metric tons (165 or 243 tons), and a hybrid propulsion system with a two-speed gearbox. They are compliant with ABS and SOLAS regulations.

The equipment is suited for medium to large size AHTS vessels, where one of the key components is a two-speed gearbox system. Wärtsilä estimates that the new design provides a reduction of 20% to 25% in fuel consumption compared to conventional diesel mechanical four engine solutions. The exhaust emissions are reduced accordingly.

The hybrid two-speed gearbox PTI (power take in) ensures a seamless transfer from one operational mode to another. When changing propeller speeds, the arrangement produces no loss in PTO (power take off).

Crew requirements need not change to operate vessels featuring the new Wärtsilä design as no special electrical skills are necessary.


Wärtsilä's new anchor handling tug supply vessel design
(Rendering courtesy Wärtsilä)

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