patrol ship

基本解释

Military tensions have been high since a South Korean patrol ship sank in March, killing 46 sailors.
军事紧张局势自从一艘韩国巡逻舰在三月沉没，导致46名水手死亡以来一直很严峻。
This time China’s response was to send a fishery patrol ship (hardly a match for a destroyer) to the area.
这次中国派遣了一艘渔政船（几乎没有一项符合驱逐舰的条件）前往该海域。
Navy officials said the sinking might have been caused by the influx of water after the fishing boat collided with the patrol ship.
海军官员说，沉没可能是渔船与巡逻舰相撞后，水涌入造成的。

That is the maritime region where North Korea has disputed a sea border for decades and where an international team of investigators concluded a North Korean submarine sank a South Korean patrol ship in March,killing 46 sailors.

The crew of the patrol ship Taepyeongyang No.9, from the Coast Guard of the Republic of Korea, nominated by the Republic of Korea, for rescuing all three crew members and 12 passengers from a cargo-passenger ship, in high winds, heavy seas and snow, in December 2010.
FORBES: Korean Ship Captain Honored for Extraordinary Bravery at Sea
In the meantime, Alex Cornelissen was captaining the Farley, and he decided to take the ship out to sea for a couple of days to patrol for illegal long-lining within the reserve.
NEWYORKER: Neptune’s Navy