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Ice-breaker implements DP and autopilot systems

The Navis DP system and autopilot on board the icebreaker Baltika The Navis DP system and autopilot on board the icebreaker Baltika

Navis reports that a new multifunctional icebreaking rescue and emergency vessel, the Baltika, has been fitted with its Nav DP4000 (DP System) and AP4000 Heading control system (autopilot) following the completion of sea trials.

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Designed by Finnish company Aker Arctic, Baltika was built by the Arctech shipyard in Helsinki and features an asymmetrical hull and an asymmetrical arrangement of its three azimuthing thrusters, enabling it to cut through ice at oblique angles of up to 45 degrees (forward and astern) in channels up to 50m wide.

The ship is designed to transit pack ice up to 1m thick at a speed of 3 knots.

The DP control system installed on the Baltika can be set to automatic and semi-automatic modes, with speed and drift angle predetermined, while its DP algorithms also act to minimise the effect of the hull’s asymmetry.

Sea trials confirmed that the dynamic positioning control and heading control systems met performance specifications of being accurate at 6 Beaufort Sea State and in wind of 14 m/s to a positioning accuracy of 1 m and a heading accuracy of 1 degree.


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