Damen unveils prototype

Dutch shipbuilder Damen has teamed up with Svitzer to design a new tug running on compressed natural gas (CNG).

The reverse stern drive vessel has been developed with Rolls-Royce's German engine manufacturer MTU Friedrichshafen for the Danish owner.

The eco-friendly model will be delivered in 2016.

It boasts high power together with lower fuel costs and a "substantial" reduction in emissions, the yard said.

Martijn Smit, Damen's sales manager for Europe, added: “With the MTU 4000 engine, this vessel is excellent for ship handling, with very quick acceleration. Manoeuvrability is combined with the vessel being green, clean and efficient.”

The 16-cylinder pure gas engine is based on the workboat Series 4000 M63.