Olympic Subsea’s newest CSOV completes sea trials

Olympic Subsea's CSOV Olympic Boreas during sea trials
Olympic Subsea's CSOV Olympic Boreas during sea trials (Photo: Ulstein)

Norwegian shipbuilder Ulstein Verft has completed conducting sea trials of a new commissioning service operation vessel (CSOV) ordered by offshore services provider Olympic Subsea. The trials of Olympic Boreas covered the propulsion system, specifically, its ability to enable the vessel to move approximately with the same speed both backwards and forward.

Olympic Boreas is the first in a series of two CSOVs being built for Olympic Subsea. Upon completion, each vessel will have a length of 89.6 metres, a beam of 19.2 metres, and 91 cabins that can house 126 personnel.

The CSOV is powered by a hybrid diesel-electric propulsion system with variable speed generators and large energy storage systems. It also features Ulstein’s proprietary twin-stern hull design with main propellers located fore and aft.

To operate the propulsion system’s various power modes, an advanced mode operation system is implemented to support green operation. For charging and emission-free port operations, the vessel is equipped with a fully integrated shore power connection.

Design work on Olympic Boreas was undertaken by Ulstein Design and Solutions. Ulstein said the hull shape and the hybrid propulsion system will ensure high operational performance and seakeeping as well as a substantially reduced environmental footprint.

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