The term "picket ship" is a noun that refers to a type of ship used to monitor and protect an area, usually in a military context. It acts like a lookout, often stationed at a point to watch for enemy ships or to provide security.
You can use "picket ship" when talking about naval operations or military strategies that involve monitoring for threats or enemy movements. It's a specific term that might not be commonly used in everyday conversation but is important in military discussions.
In more advanced contexts, "picket ships" can be part of larger naval tactics and strategies, such as "picket duty," where ships are assigned specific zones to secure.
While there are no specific idioms or phrasal verbs directly related to "picket ship," you might encounter phrases like: - "On guard": meaning to be alert and watchful. - "Keep an eye out": meaning to watch carefully for something.