Icebreaker
In May 2007, sea trials were completed for the nuclear-powered Russian icebreaker NS . The vessel was put into service by Murmansk Shipping Company, which manages all eight Russian state-owned nuclear icebreakers. The keel was originally laid in 1989 by Baltic Works of Leningrad, and the ship was launched in 1993 as NS "Ural". This icebreaker was intended to be the sixth and last of the "Arktika" class, and currently is the world's largest icebreaker.
CCGS John G. Diefenbaker
"John G. Diefenbaker" is designed to break level ice with a thickness of and with a snow cover at over 3 knots. In terms of icebreaking capability, this ranks her just below the largest Russian nuclear-powered icebreakers. Her operational range at in Sea State 3 is projected to be over and she can operate in ice at full power for 25 days. The logistical endurance of the vessel will be 270 days. The new icebreaker will be able to achieve a maximum speed of about in open water, but her normal cruising speed is around 12 knots.