Those ships are apparently different from the Russian navy vessels dispatched this week to search for the missing ship.

这些船只很明显不同于本周被排除寻找失踪的船只俄罗斯海军军舰。

youdao

This month, researchers aboard the U.S. icebreaking ship Nathaniel B. Palmer are cruising in the Ross sea in search of the signatures of this current system.

研究人员于本月登上了正在罗斯海巡航的美国破冰船纳撒尼尔·b·帕尔默号，寻找这类洋流系统的特征。

youdao

This month, researchers aboard the U. S. icebreaking ship Nathaniel B. Palmer are cruising in the Ross Sea in search of the signatures of this current system.

研究人员于本月登上了正在罗斯海巡航的美国破冰船纳撒尼尔·B·帕尔默号，寻找这类洋流系统的特征。

youdao

The official said U.S. or allied personnel wouldn't board the ship by force and would search the ship only with the permission of its crew.

WSJ: U.S. Fortifies Hawaii to Meet Threat From Korea

On Jan. 19, the U.S.S. San Antonio approached the Monchegorsk in the Red Sea and asked its captain for permission to search the ship, which was granted.

WSJ: Obama Offers Open Channels to Pakistan, Iran, North Korea

Michael Mullen, chairman of the Joint Chiefs of Staff, said Thursday that the United States would not forcibly board a North Korean ship but, in accordance with a recent U.N. resolution, would request permission to search the ship or press any port the ship docks in to inspect it for illegal materials.

CNN: Gates: U.S. ready for North Korea missile