United States coastguard icebreaker left port in Alaska last week to join a Canadian icebreaker to conduct a seismic survey of the Beaufort seabed north of the Yukon-Alaska border.

• 一艘美国海岸警卫队破冰船上周从阿拉斯加海港启航，与一艘加拿大破冰船会合，对加拿大育空地区(Yukon)与阿拉斯加边境以北的波弗特(Beaufort)海床进行地震勘测。