Propulsion selected for Boskalis, AMSA DP emergency towing vessel

The gearboxes will feature power take-out (PTO) and power take-in (PTI), which enables for a broad variety of operational modes during transits and operations, and when the vessel is in DP2.

The control system includes Brunvoll’s BruCon PTC propulsion and thruster control, BruCon JS joystick control and BruCon DP2, which has a target tracking mode enabling this vessel to follow objects such as a remotely operated vehicle.

“The control system for this vessel is one of the most advanced systems to date by Brunvoll,” said Brunvoll vice president for sales, Oddbjørn Følsvik. “We have been working with this project for quite a while, and it is rewarding when it finally comes together. All disciplines in Brunvoll have been working closely together with the owner and designer to realise this project, and even though the schedule is tight, we will deliver on time.”

The main engines and shaft generators running PTO on both sides will deliver both power for propulsion and electricity on board. With PTI, propulsion on both sides is run by the electrical motors, powered either by auxiliary motors or batteries. 

In lower load conditions, this mode can be used to avoid starting up the larger main engines and instead run smaller engines on more optimal load conditions. In a hybrid mode, one side runs PTO and the other runs PTI, so one main engine powers both propellers.

For maximum bollard pull, both sides are powered by main engines and PTI. This boost mode takes out the full power of the vessel to support special operations, such as towing or anchor handling.

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