METHOD OF BREAKING ICE COVER Russian patent published in 2002 - IPC

FIELD: navigation. SUBSTANCE: method consists in excitation of flexural gravitational waves 3 in ice 1 by means of submarine ship 2 running at resonance speed. After excitation of resonance flexural gravitational waves 3, speed of ship 2 is reduced and she again runs at resonance speed at the moment first trough 4 of wave behind ship's stern reaches point of location of ship's propeller 5 whose speed is periodically decreased and increased at frequency of resonance flexural gravitational waves. EFFECT: enhanced efficiency. 1 dwg