An icebreaker is a special-purpose ship or boat designed to move and navigate through ice-covered waters, and provide safe waterways for other boats and ships. Although the term usually refers to ice-
USCGC Healy (WAGB-20), at right, breaks ice around the Russian-flagged tanker Renda, 250 miles (400 km) south of Nome, Alaska, in January 2012.
A 17th-century Russian koch in a museum
City Ice Boat No. 1 at the Delaware River. The paddle steamer was built in 1837.
Yermak is considered the first true modern sea-going icebreaker.
USCGC Polar Star is a United States Coast Guard heavy icebreaker. Commissioned in 1976, the ship was built by Lockheed Shipbuilding and Construction Company of Seattle, Washington, along with sister s
USCGC Polar Star
The upward angle of Polar Star's bow is designed so that the hull rides up onto the ice surface during icebreaking operations. Subsequently, the ship's weight and forward motion combine to fracture the ice.
Polar Star makes a channel for a cargo ship, 2019