With an overall length of 83.5 metres (273 ft 11 in) and a moulded beam of 19.4 metres (63 ft 8 in), Voima was once the longest and widest icebreaker ever built in Finland.
At a draft of 6.4 metres (21 ft 0 in), her waterline measures 77.5 metres (254 ft 3 in) in length and she can break a channel with a width of 18.7 metres (61 ft 4 in).
Although her refit increased the draft of the ship to 7 metres (23 ft 0 in) and displacement from 4,415 tons to 5,209 tons, she is now the smallest and lightest of the Finnish state-owned icebreakers.
Voima was built to the highest ice class at the time, Lloyd's Register 1A, with a fully welded hull and shell plating measuring 27 to 30 millimetres (1.1 to 1.2 in) in thickness in the ice belt.
Her ice strengthening was further increased in the refit.
While Voima holds the highest Finnish-Swedish ice class, 1A Super, it has hardly any meaning for icebreakers which are of considerably stronger build than merchant ships operating in their care.

Despite being the most advanced icebreaker in the world, Voima still looked aesthetically pleasing with her low, gently rounded hull and superstructure.
Many of her features, such as the open bridge with covered bridge wings, could be traced back to the pre-war steam-powered icebreakers.
She had two continuous decks and a long forecastle that contained most of the cabins and social areas for the crew of 58.
Although Voima was built with two small cargo holds for storage purposes, most of the space under the main deck is occupied by the engine and propulsion motor rooms, making the icebreaker literally "a ship loaded with power".
She also has eight heeling tanks that can be used to free the icebreaker from compressive pack ice.
Like the steam-powered icebreakers built before the war, she was also fitted with deck gun mounts.
During the refit, the old superstructure was completely removed and replaced with an angular deckhouse slightly resembling those of Sisu and Urho.
The crew, now accommodated in individual cabins high in the superstructure away from the noises generated by the icebreaking process, was reduced to 44 due to advancing automation.
Later the crew has been further reduced to 21.
With an overall length of 83.5 metres (273 ft 11 in) and a moulded beam of 19.4 metres (63 ft 8 in), Voima was once the longest and widest icebreaker ever built in Finland. At a draft of 6.4 metres (21 ft 0 in), her waterline measures 77.5 metres (254 ft 3 in) in length and she can break a channel with a width of 18.7 metres (61 ft 4 in). Although her refit increased the draft of the ship to 7 metres (23 ft 0 in) and displacement from 4,415 tons to 5,209 tons, she is now the smallest and lightest of the Finnish state-owned icebreakers. Voima was built to the highest ice class at the time, Lloyd's Register 1A, with a fully welded hull and shell plating measuring 27 to 30 millimetres (1.1 to 1.2 in) in thickness in the ice belt. Her ice strengthening was further increased in the refit. While Voima holds the highest Finnish-Swedish ice class, 1A Super, it has hardly any meaning for icebreakers which are of considerably stronger build than merchant ships operating in their care.
Despite being the most advanced icebreaker in the world, Voima still looked aesthetically pleasing with her low, gently rounded hull and superstructure. Many of her features, such as the open bridge with covered bridge wings, could be traced back to the pre-war steam-powered icebreakers. She had two continuous decks and a long forecastle that contained most of the cabins and social areas for the crew of 58. Although Voima was built with two small cargo holds for storage purposes, most of the space under the main deck is occupied by the engine and propulsion motor rooms, making the icebreaker literally "a ship loaded with power". She also has eight heeling tanks that can be used to free the icebreaker from compressive pack ice. Like the steam-powered icebreakers built before the war, she was also fitted with deck gun mounts. During the refit, the old superstructure was completely removed and replaced with an angular deckhouse slightly resembling those of Sisu and Urho. The crew, now accommodated in individual cabins high in the superstructure away from the noises generated by the icebreaking process, was reduced to 44 due to advancing automation. Later the crew has been further reduced to 21.
Voima (1952 icebreaker)