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ice breaker click to hear : ice breaker

Boat that opens up a navigable passage through ice.
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See ice breaker in : french | spanish
rear propeller stem propeller stem

rear propeller click to hear : rear propeller

Screw driven by a powerful engine to propel the ice breaker.

stem propeller click to hear : stem propeller

Screw that pulls up water from under the ice sheet to weaken its support thus making it easier to break and move.

stem click to hear : stem

Reinforced part of the boat’s prow that crushes the ice with its weight and then pushes it aside to open a channel.