"In the 1980s, hovercraft were shown to be effective as icebreakers on rivers. Instead of displacing or crushing the ice from above, they work by injecting a bubble of air under the ice sheet, causing it to break off under its own weight and be swept downstream by the current. The purpose is usually not to provide navigation channels but rather to prevent ice dams from forming and causing local flooding."
Zijn dus niet heel erg geschikt.
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