coastal motor boat
Country of origin
United Kingdom
United Kingdom
ManufacturerJohn I. Thornycroft & Company
Coastal Motor Boat was a small high-speed British motor torpedo boat used by the Royal Navy in the First World War and up to end of the Second World War.
During the First World War, following a suggestion from three junior officers of the Harwich Striking Force that small motor boats carrying a torpedo might be capable of travelling over the protective minefields and attacking ships of the Imperial German Navy at anchor in their bases, the Admiralty gave tentative approval to the idea and, in the summer of 1915, produced a Staff Requirement requesting designs for a Coastal Motor Boat for service in the North Sea.
These boats were expected to have a high speed, making use of the lightweight and powerful petrol engines then available. The speed of the boat when fully loaded was to be at least 30 knots (56 km/h; 35 mph) and sufficient fuel was to be carried to give a considerable radius of action.
They were to be armed in a variety of ways, with torpedoes, depth charges or for laying mines. Secondary armament would have been provided by light machine guns, such as the Lewis gun. The weight of a fully loaded boat, complete with a 18-inch (450 mm) torpedo, was to not exceed the weight of...
During the First World War, following a suggestion from three junior officers of the Harwich Striking Force that small motor boats carrying a torpedo might be capable of travelling over the protective minefields and attacking ships of the Imperial German Navy at anchor in their bases, the Admiralty gave tentative approval to the idea and, in the summer of 1915, produced a Staff Requirement requesting designs for a Coastal Motor Boat for service in the North Sea.
These boats were expected to have a high speed, making use of the lightweight and powerful petrol engines then available. The speed of the boat when fully loaded was to be at least 30 knots (56 km/h; 35 mph) and sufficient fuel was to be carried to give a considerable radius of action.
They were to be armed in a variety of ways, with torpedoes, depth charges or for laying mines. Secondary armament would have been provided by light machine guns, such as the Lewis gun. The weight of a fully loaded boat, complete with a 18-inch (450 mm) torpedo, was to not exceed the weight of...
