Brave - class fast patrol boat The Brave - class fast patrol boats were a class of two motor torpedo boats that were the last of their type for the Royal Navy ( RN ) Coastal Forces division . They formed the basis for a series of simpler boats , which were widely built for export . Brave class . The Brave class followed the Dark class of convertible motor torpedo boats / gunboats . They were larger than the Dark class , and differed in being powered by gas turbine engines rather than the diesel engines of the Dark class . ( Gas turbine propulsion had been tested in the Bold class of two experimental fast patrol boats ) . Three Bristol Proteus engines propelled the Braves to a maximum of . Like the Dark class , the Braves had a mahogony skin over aluminium frame construction . They were built to be able to be used as either Motor Torpedo Boat s or Motor Gun Boat s . For the former role they had a 40mm Bofors gun , four torpedo es ( 21 inch diameter ) and two depth charges , in the latter two 40 mm guns and two torpedoes . It was planned to arm the ships with a new 3 . 3 inch ( 84 mm ) gun based on the 20 pounder tank gun in a stabilised mounting , but this was abandoned . The Royal Navy abandoned the idea of large scale coastal forces in 1957 , so only two " Brave " s were built for the Royal Navy . The two Braves , along with a single member of the Dark class , formed the Coastal Forces Trials and Special Service Squadron , based as Gosport . These were used to maintain proficiency in Coastal Forces operations , also being used as targets and for fishery protection . The two Braves were retired from use in 1970 . Ferocity and derivatives . The Braves were expensive boats , so as a private venture , Vospers produced a simpler derivative , " Ferocity " . This was smaller than the Braves , with an overall length of and was powered by two Proteus engines instead of three , which were supplemented by two diesel engines for cruising . Construction was of all wooden construction to minimise costs . Despite the reduced size and power , performance and armament were similar to the Braves . While Ferocity herself was not sold , it formed the basis for a number of boats for export . These included sales to West Germany ( two , called the Vosper class ) , Denmark ( five of the Søløven - class ) , Greece , Malaysia for the RMN in 1966 ( 4 craft ) , Brunei and Libya , and was also the basis for the Scimitar class fast training boat . Boats . The two RN craft were both built by Vospers at Portchester : At the end of their life they were sold to the Haydon - Baillie aircraft museum . Denmark purchased six Søløven - class fast patrol boats , with the larger hull form and the 3 - Proteus powerplant of the Brave class and the wooden construction of " Ferocity " . Armament consisted of two 40 mm Bofors guns and four torpedoes . The first two boats , " Søløven " and " Søridderen " were built by Vospers ( with " Søløven " being paid for by the United States and hence given the nominal US designation " PT - 821 " ) , with the remaining four boats being built under license by the Royal Dockyard , Copenhagen . They were placed into reserve in 1988 , and disposed of when the Flyvefisken class patrol vessel s entered service , all being disposed of by 1992 . Germany ordered two fast patrol boats ( both designated Type 153 ) from Vospers on 22 August 1960 . The first , " Strahl " was based on the Brave class , with three Proteus gas turbines , while " Pfeil " was based on the smaller " Ferocity " with two Proteus . Armament was the same convertible combination of Bofors 40 mm guns and torpedoes as the Brave class , with the option of replacing the torpedoes with eight mines . They were transferred to Greece in 1967 . In October 1966 , Libya ordered three fast patrol boats of the " Susa " class from Vospers based on the Danish " Søløven " class , with the wooden construction of " Ferocity " but a larger hull powered by three Proteus engines . Armament of eight SS . 12 wire guided anti - ship missile s and two 40 mm Bofors guns . The Royal Malaysian Navy ordered four Perkasa class fast patrol craft on 22 October 1964 to be designed and built by Vospers . The design was similar to the Danish Søløven class , with a large ( ) wooden hull with an aluminium superstructure and powered by three Proteus engines . The original armament was four torpedoes ( which could be swapped for 10 mines ) , a single 40 mm Bofors gun forward and a 20 mm cannon aft . The four boats were delivered in 1967 and re - armed with eight SS - 12 missiles in 1971 . Model . In the 1970s the Japanese model company Tamiya produced a 1 : 72 scale model of the KD " Perkasa " .