sentences:  But the Soviet naval authorities changed the plans and the ice-breaker was sent instead to help ships in distress in the Kara and Laptev Seas.The "Sadko", however, became itself trapped in fast ice at 75°17'N and 132°28'E in the region of the New Siberian Islands.Two other Soviet icebreakers, the "Sedov" and the "Malygin", both in the same area researching the ice conditions, became trapped by sea ice as well and drifted helplessly.