British MGBs Fought German E-Boats Every Night — With No Torpedoes, Just Machine Guns

Summer 1940. German E-boats terrorized the English Channel, torpedoing coastal convoys within sight of British shores. Fast, deadly, and nearly impossible to catch, they disappeared into darkness before Royal Navy destroyers could respond. Motor Torpedo Boats carried torpedoes but lacked the firepower to engage E-boats directly—torpedoes were useless against nimble raiders executing forty-knot evasive maneuvers. Britain needed a different solution. Not a weapon to sink E-boats, but a weapon to drive them away from convoys before they could attack. The answer was radical: Motor Gunboats carrying no torpedoes whatsoever. Just guns. Lots of guns. These 70-foot mahogany vessels cost £25,000 each—one-eighth the price of a destroyer—and could be built by yacht makers in six months. They mounted 6-pounder cannons, 20mm Oerlikons, and multiple machine guns. Crew sizes reached thirty men operating the heavy armament. Their mission wasn't destroying E-boats; it was positioning themselves as obstacles E-boats couldn't bypass without accepting casualties. Between 1940 and 1945, British Motor Gunboats fought 464 actions in home waters, claiming 269 enemy vessels sunk or damaged. They proved that preventing attacks mattered more than destroying attackers. When E-boats encountered MGB flotillas between themselves and convoys, they typically withdrew rather than risk gun battles that favored the British vessels armed purely for surface combat. This video examines the economic and tactical logic of building coastal defenders without torpedoes—abandoning Royal Navy tradition in favor of mission-specific optimization. MGBs cost £30 million total and protected Britain's coastal approaches throughout the war. A destroyer-based strategy would have cost identical money but failed the mission entirely—destroyers couldn't operate in shallow waters, couldn't be risked in mined channels, and couldn't chase E-boats through coastal shallows. The innovation wasn't superior technology. It was recognizing that coastal defense required specialized vessels optimized for specific missions rather than general-purpose warships. By sacrificing everything unnecessary—torpedoes, armor, ocean-going capability—and maximizing gun firepower, MGBs became floating obstacles that denied E-boats their attacking opportunities. Sometimes the best weapon isn't the most powerful. It's the one that prevents the enemy from accomplishing his mission, and that you can afford to build in the numbers needed when you need them. #navalhistory #britishmgb #e-boats #militaryhistory #ww2documentary #battleofbritain Sources *Primary Historical Records:* Admiralty records of Coastal Forces operations, 1940-1945 British Power Boat Company construction records and specifications Royal Navy Coastal Forces operational reports and action summaries Motor Gunboat flotilla war diaries and engagement reports *Published Works:* Scott, Peter. "The Battle of the Narrow Seas: The History of Light Coastal Forces in the Channel and North Sea 1939-1945" (Seaforth Publishing, 2009) Konstam, Angus. "British Motor Gun Boat 1939-45" (Osprey Publishing, 2010) Williamson, Gordon. "E-Boat vs MTB: The English Channel 1941-45" (Osprey Publishing, 2011) Reynolds, Leonard C. "Motor Gunboat 658" (Cassell Military Paperbacks, 2002) Bulkley, Captain Robert J. "At Close Quarters: PT Boats in the United States Navy" (Naval History Division, 1962) *Motor Gunboat Design and Construction:* British Power Boat Company technical specifications and blueprints Fairmile Marine design documentation for Types C and D Rose, Diggory and Fisher, Stephen. "Royal Navy Motor Gun Boat Manual: 1942-45" (Haynes, 2017) North, A.J.D. "Royal Naval Coastal Forces" (Almark Publications, 1972) Construction records from British Power Boat, Vosper, Camper & Nicholson, and Fairmile Marine *MGB 81 Specific Documentation:* National Historic Ships UK registry entry for MGB 81 Service history and action reports, 8th MGB Flotilla Restoration documentation and technical analysis British Military Powerboat Trust historical records *E-Boat Operations and Capabilities:* German Kriegsmarine Schnellboot operational records Lürssen shipyard design and construction documentation Frank, Hans. "Die Deutschen Schnellboote im Einsatz: Von den Anfängen bis 1945" Dallies-Labourdette, Jean-Philippe. "Deutsche Schnellboote, 1939-1945" (Motorbuch Verlag, 2006) *Channel Battles and Tactical Development:* Coastal Forces engagement reports for 464 home water actions Robert Hichens tactical doctrine development and RNVR service records Intelligence reports on E-boat tactics and German coastal convoy operations RAF Coastal Command coordination with Coastal Forces operations *Economic and Production Data:* Admiralty cost analyses for destroyer, MTB, and MGB production British shipyard production statistics and construction timelines