Patrol boats

A patrol boat is a relatively small naval vessel generally designed for coastal defense duties. There have been many designs for patrol boats, though the navy currently has only a single class. They may be operated by a nation's navy or coast guard, and may be intended for marine ("blue water") or estuarine or river ("brown water") environments. The Navy has approximately a dozen in active service, which are mainly used in the littoral regions of the Persian Gulf, but have also been used for home port patrols and drug interdiction missions. The navy's current class of patrol boats have names based on weather phenomena.