Royal Marines Armoured Support Group The current Royal Marines Armoured Support Group ( RMASG ) is an element of the Royal Marines that operates the Viking BvS 10 All Terrain Vehicle . It is the successor to the Royal Marines Armoured Support Company , and is , in effect , on permanent loan from operational command of 3 Commando Brigade to the Battle Group currently in Afghanistan . It is based at Royal Naval Air Station Yeovilton in Somerset . In the Second World War , the RMASG was formed to give British and Commonwealth forces heavy fire support in the opening attacks of the Normandy Landings . History . The original Royal Marines Armoured Support Group was formed in World War II and took part in the Invasion of Normandy , where it provided fire support . It was primarily equipped with Centaur IV tanks fitted with a 95mm howitzer ; there were also a smaller number of Sherman tank s , which were used as artillery observation posts or command vehicles . The Group consisted of five Armoured Support Batteries , organised in two " Armoured Support Regiments " , each of two Armoured Support Batteries , plus an independent " Armoured Support Battery " . Each Battery was subdivided into four Troops , with each Troop equipped with four Centaur IV and one Sherman tank , giving a total of 80 Centaur and 20 Sherman tanks in the entire Group . The Group did not fight as a single military formation , but rather was divided between the British & Canadian D - Day beaches . The World War II RMASG was disbanded two weeks after D - Day ( D + 14 ) . The present day Royal Marines Armoured Support Group was formed on 10 December 2007 . Role and equipment . RMASG is under the overall control of 539 Assault Squadron Royal Marines and is the armoured element of 3 Commando Brigade , equipped with the Viking armoured vehicle . The Viking BvS10 All Terrain Vehicle , is a protected tracked vehicle , which can be configured for troop transport , command and control and other tasks . Viking is equipped with the 7 . 62mm General Purpose Machine Gun and some crewmen are armed with the L22 carbine version of the British SA - 80 rifle . Viking has been deployed operationally with British Forces in southern Afghanistan , supporting both 3 Cdo Bde and other roulement s . The need for the RMASG came about because the Viking was so successful with 3 Cdo Bde on Op Herrick 5 that the incoming forces on Op Herrick 6 requested that the Vikings stay on creating a problem as the Army has no Viking trained drivers . The solution was the RMASG , an expanded unit that could continue to operate the Viking for future roulements , this led to the drivers of the RMASG having one of the highest operational tempos in the forces . Future requirements . On 12 June 2008 , the British Ministry of Defence publicly issued a notice stating that " " There is a requirement under consideration for an All Terrain Military vehicle that is armoured , amphibious and fitted with ( or fitted for but not with ) weapon systems , in a supporting role to VIKING , to replace the existing BV206 " " . The new system would be known as the All Terrain Vehicle Support ( ATV ( S ) ) and be capable of high mobility operation in a variety of terrains and threat environments as well as being amphibious . A need for between 47 and 212 ATV ( S ) was foreseen at an estimated cost of between £100 million to £250 million . However , just over a month later , on 17 July 2008 , the contract notice setting out the requirement for ATV ( S ) was cancelled . The Ministry of Defence gave the following reason : The requirement for an All Terrain Military Vehicle ( ATV ( S ) ) under LASS1A / 0340 has been delayed due to internal reviews . It is anticipated that a revised announcement will be advertised in the UK MoD Defence Contracts Bulletin in mid 2009 and the revised announcement will also be sent to the EDA for inclusion in the Electronic Bulletin Board ( EBB ) at that time . On 19 December 2008 the Ministry of Defence announced that 100 Singapore Technologies Kinetics Bronco All Terrain Tracked Carrier vehicles would be purchased as an Urgent Operational Requirement to replace the Viking vehicles in use in Afghanistan . The new vehicle would be known in British service as the Warthog and enter service in 2009 . The press release further stated that " " When the Vikings are brought back from Afghanistan they will be used by the Royal Marines on training exercises " " . Nevertheless , Viking appears to be the core armoured vehicle for the Royal Marines in the future . 99 Vikings are being upgraded with new mine blast protection bodywork and brought back to their original amphibious standard , having been adapted for the rigours of land operations . Awards . The Royal Marines Armoured Support Group was awarded the ' True Grit : Group ' award during the 2008 Sun Military Awards , " For a small unit or group of men or women from any service who have together performed a single act of true grit - through courage , determination or self - sacrifice – be it on or off duty " . See also . Hobart ' s Funnies