Transforming the offshore construction market

2nd Quarter 2014 Shaft power components

In January 2014, Mojo Maritime, British marine renewable energy specialist, and Hammonia Reederei, a German ship owner based in Hamburg, signed a memorandum of understanding to finance and build the High Flow installation vessel, HF 4. With the ability to operate in currents up to 10 knots using dynamic positioning, the special construction vessel is set to transform the offshore construction market. The HF 4 has a twin hull configuration designed by Voith and is powered by four Voith Schneider propellers.

Engineered by Voith naval architects, the design is based on Mojo Maritime’s vision of a vessel designed to install tidal energy turbines in high energy tidal streams. It boasts an open deck space of 1000 square metres, accommodates 44 people and has a maximum A-frame crane lift capacity of 250 tons. It can handle all tidal energy work steps from the installation of the turbine support structure to the mounting of the turbine. It also has wide potential in the offshore wind sector and the more general subsea construction market.

The twin hull design provides the stability required. The centre position of the moon pool allows operations to be carried out at the point of the least vessel motion during swells. In addition, the extremely short response times of the propellers allow precise dynamic positioning, even under the most adverse tidal conditions. HF 4 aims to minimise the installation risks of offshore construction projects while at the same time providing a significant reduction in installation costs.

For more information contact Terry-Lynn McIntosh, Voith Turbo, +27 (0)11 418 4036, [email protected], www.voith.com

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