Fast-Attack Boats.

Gun Boats.

The age of the Gunboat was perhaps in World War-II. (1939-45), when both Nazi-Germany with their E-Boats and the British equivalent deployed similar vessels to work the English/French Channel. The U.S and Japan also deployed basically similar types boasts in the far east and Pacific.

These boats were well armed and could have the advantage of operating in shallow waters, but could also move fast from A to B/A to Z. There role was to patrol and observe, but they became a handy and cheap tool to do other work, such as planting and recovering of individual spies. 

Initially they were not as well armed as they are today, and they ran the risk of being spotted and attacked by aircraft. 

Today these craft are more larger and have a host of guns, missiles and torpedo tubes fitted. They are popular with smaller navies, such as in the Persian Gulf states. It was he former Soviet Union (Russia) who during the 'Cold War years became one of the largest producers of these types of boats, but it was the British company Vosper-Thorny craft that is perhaps one of the best builders of the Fast Attack Craft type world wide.