Topic summary
Patrol Craft
Extracted from the Wikipedia article Patrol boat.
A patrol boat (also referred to as a patrol craft, patrol ship, or patrol vessel) is a relatively small naval vessel generally designed for coastal defence, border security, or law enforcement. However, large size patrol vessels are also operated by multiple navies and coastguards. There are many designs for patrol boats, and they generally range in size. They may be operated by a nation's navy, coast guard, police, or customs, and may be intended for marine ("blue water"), estuarine ("green water"), or riverine ("brown water") environments.