American carriers travel with an unseen companion: at least one nuclear-powered attack submarine.

美国航母有水下隐形群组伴随：至少一艘核动力攻击潜艇。

youdao

Russia's Nerpa nuclear attack submarine, damaged in a fatal accident during tests in November last year, has successfully passed final trials, a Pacific Fleet spokesman said on Monday.

俄罗斯太平洋舰队发言人周一表示，在去年11月测试中遭遇死亡事故的Nerpa攻击型核潜艇已经成功通过了最后的测试审核。

youdao

Northrop Grumman Shipbuilding on Tuesday delivered the attack submarine New Mexico to the U.S. Navy, four months earlier than its contract delivery date.

诺斯罗普·格鲁门公司的造船厂周二表示，攻击型潜艇新“墨西哥”已经交付给美国海军，比合同的交货日期提前4个月。

youdao

International investigators have blamed a North Korean submarine for the attack.

VOA: special.2010.05.29

There are also launchers for surface-to-air missiles, various gun placements, submarine attack torpedoes and two combat helicopters.

BBC: News | In Depth | Military Fact Files

The effect of project delays was underlined this week in a report from the National Audit Office which revealed that the first three new Type 45 destroyers will enter service without sonar defences to protect them against submarine attack.

ECONOMIST: Public investment

The 97m (318ft)-long craft is the UK's newest nuclear-powered attack submarine and joined the Royal Navy fleet in August 2010.

BBC: Able Seaman Ryan Samuel Donovan