The Fairmile D motor torpedo boat MGB 606
|Name:||Fairmile D motor gun boat|
|Preceded by:||Fairmile C motor gun boat|
|Length:||115 ft (35 m)|
|Beam:||20 ft 10 in (6.35 m)|
|Draught:||4 ft 9 in (1.45 m) to 4 ft 11 in (1.50 m) mean deep load|
|Propulsion:||4 × Packard 4M 2500 petrol engines, total 5,000 hp (3,728 kW)|
|Speed:||29 knots (54 km/h; 33 mph) at full load|
|Notes:||Specifications from Conway's All the World's Fighting Ships 1922-1946. and Motor Gunboat 658|
The Fairmile D motor torpedo boat was a type of British motor torpedo boat (MTB) and motor gunboat (MGB) designed by Bill Holt and conceived by Fairmile Marine for the Royal Navy. Nicknamed "Dog Boats", they were designed to combat the known advantages of the German E-boats over previous British coastal craft designs. They were bigger than earlier MTB or motor gunboat (MGB) designs (which were typically around 70 feet) but slower, at 30 knots compared to 40 knots.
Unlike the Fairmile B designs, the Dog Boats were only produced in component form in Britain. Some were built for the RAF's Marine Branch for use in the long range air-sea rescue for downed airmen. 229 boats were built between 1942 and 1945.
Many versions were produced or converted from existing boats; MGB, MTB, MA/SB, LRRC and post-war FPB.
Since the Fairmile D could be fitted out with a mix of armament that gave it the capabilities of both a motor gunboat and a motor torpedo boat, the MGB designation was dropped.[disputed ]
Today the D-type is a popular choice among boat modelers.
6-pounder (57 mm) gun with Molins autoloader mounted on a Fairmile D