depending on operating conditions. Equipped for escort icebreaker duties, Voima had a steam-powered towing winch, a cable and a stern notch. In difficult ice conditions the ship being assisted was taken into tow, and in extremely difficult compressive ice it was pulled to the icebreaker's stern notch. For salvage operations Voima had a powerful centrifugal pump capable of pumping 1,000 tons of water per hour. References Bibliography Icebreakers of Finland 1918 ships Ships built in the Russian Empire World War II naval ships of Finland Icebreakers of the Soviet Union