| 41. | Icebreakers keep 23 ports open for traffic even in winter.
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| 42. | These features would become the standard for postwar icebreakers until the 1980s.
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| 43. | Later Canadian icebreakers were built with diesel-electric powertrain.
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| 44. | Subsequently, icebreakers are required for maritime resupply missions to McMurdo Station.
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| 45. | In 1997 a third multipurpose icebreaker was ordered from Finnyards.
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| 46. | And only on August 28, 1938, could icebreaker Polar Station.
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| 47. | Her crew were rescued by the icebreaker " Lenin ".
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| 48. | The name change was made to avoid confusion with the other icebreaker.
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| 49. | Both icebreakers approached the ship, and the surrender was formally accepted.
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| 50. | Icebreaker began selling its products in New Zealand, followed by Australia.
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