Wärtsilä launches new series of AHTS designs

APRIL 21, 2015 — Wärtsilä is using this week’s Sea Asia event in Singapore to launch a new series of AHTS (Anchor Handling Tug Supply) vessel designs that put the focus on simplicity, efficiency, low fuel consumption, and a reduced environmental impact.

The new Wärtsilä series of AHTS designs feature Bollard Pull options of 180 tonnes, with options for 150 or 220 tonnes, and a hybrid propulsion system with a two-speed gearbox. The designs are fully compliant with ABS and the latest SOLAS regulations.

Wärtsilä estimates that the new design provides a reduction of 20 to 25 percent in fuel consumption compared to conventional diesel mechanical four engine solutions. The exhaust emissions are reduced accordingly.

A key component is the hybrid two-speed gearbox PTI (Power Take In) solution. It ensures a seamless transfer from one operational mode to another, with the ability to work efficiently in all operational modes. When changing propeller speeds, the arrangement produces no loss in PTO (Power Take Off) power. Crew requirements need not change to operate vessels featuring the new Wärtsilä design as no special electrical skills are necessary.

“Wärtsilä has an impressive track record and extensive experience in producing efficient AHTS designs, all of which are based on proven technology and the utilization of high quality equipment. As a result, our ship designs consistently set new standards in terms of efficiency and environmental sustainability. Our unique expertise, knowledge, and global support are the keys to maximizing the profits and asset values of our customers,” says Riku-Pekka Hägg, Vice President, Wärtsilä Ship Design.