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.
Ice Boat No. 3
To replace "Ice Boat No. 3", the Department ordered a modern icebreaker from William Cramp & Sons at a cost of $350,000. Said to be "the most powerful icebreaker ever constructed" in the United States, and able to do the work of two of the older ice boats combined, the new icebreaker, named "John Weaver" after the Mayor of Philadelphia, entered service in time for the winter of 1906. The new icebreaker eventually became known as "Ice Boat No. 3" after her predecessor.