All employees at the submarine base require security clearance.

所有潜水艇基地的雇员必须得到安全部门的审查许可方可录用。

《牛津词典》

A U. S. SSBN is prepared for demagnetization at the Kitsap Naval Submarine Base near Bangor, Washington.

一艘美国SSBN在华盛顿班戈区附近的Kitsap潜艇基地准备消磁。

youdao

One problem with this is that the key must be securely agreed before the submarine leaves base.

这样会遇到一个问题，就是在离开基地前，潜艇与基地之间必须秘密地确定密钥。

youdao

It was a pattern which Sheridan would repeat many times - serving jail terms for refusing to pay the poll tax and a fine after taking part in blockades at Faslane nuclear submarine base.

BBC: The rise and fall of Tommy Sheridan and the left

The submarine headed back to its base on the Kola Peninsula, by the Barents Sea, which took five hours.

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Meanwhile, Russia has sent a naval flotilla of seven warships led by an anti-submarine destroyer to its Syrian base at Tartus, according to Interfax news agency.

BBC: Envoy Kofi Annan presses Iran and Iraq over Syria crisis