and two Cessna 406 maritime patrol aircraft. Royal Air Force A single front-line Royal Air Force station is located in Scotland. RAF Lossiemouth, located in Moray, is the RAF's northern QRA(I) base, supported by four squadrons of Typhoons. Military Training Areas The only open air live depleted uranium weapons test range in the British Isles is located near Dundrennan. As a result, over 7000 weakly radioactive munitions lie on the seabed of the Solway Firth. In 2007, the MoD land holdings in Scotland (owned, leased or with legal rights) was 1,153 km2 representing 31.5% of the MoD's British estate. Prominent Training Areas include Garelochhead, Cape Wrath, Barry Buddon, The Army Selection and Development Center in Penicuik, and Castlelaw in the Pentland Hills. Industry Defence contractors and related companies employ around 30,000 people in Scotland and form an important part of the economy. The principal companies operating in the country include: BAE Systems, Rolls-Royce, Raytheon, Thales and Babcock. Royal Navy bases in Scotland HMNB Clyde (HMS Neptune), Argyll and Bute Rosyth Dockyard (HMS Caledonia), Fife DM Beith, Beith, North Ayrshire RM Condor formerly HMS Condor, Arbroath, Angus Loch Ewe Former Royal Navy bases in Scotland Scapa Flow, Orkney Invergordon, Easter Ross Port Edgar, South Queensferry, City of Edinburgh , Rosyth Port HHZ, Loch a' Chàirn Bhàin, Kylesku, Sutherland, Highland HMS Columbine, Royal Navy Destroyer Depot. Based at Port Edgar 1917–1938 HMS Curlew, Inellan, Dunoon, Argyll & Bute Harbour Defence Depot HMS Dundonald, Troon, Combined Operations Craft Working up base HMS Hopetoun, Combined Operations Training Centre. Based at Port Edgar 1943–1945 . Minesweeping & Fisheries Protection Depot. Based at Port Edgar 1939–1943 and 1946–1975. Based at Granton 1943–1946 HMS Quebec, Inverary, Argyll & Bute, Combined Operations Craft Working up base , Port Bannatyne, Argyll & Bute, Midget submarine training shore base HMS Western Isles, Tobermory, Argyll & Bute, Anti-submarine working up base Former Royal Naval Air Stations in Scotland , Arbroath, Angus , Evanton, Ross and Cromarty, Highland , Lossiemouth, Moray , Prestwick, South Ayrshire , Crail, Fife HMS Landrail, Macrihanish, Argyll and Bute , Rattray, Aberdeenshire , Donibristle, Fife HMS Nighthawk, Drem, East Lothian , Fearn, Wester Ross, Highland , East Haven, Angus , Grimsetter, Kirkwall, Orkney , Abbotsinch, Renfrewshire: (Now Glasgow International Airport) HMS Sparrowhawk, Hatston, Orkney HMS Tern, Twatt, Orkney , Heathfield, Ayr, South Ayrshire Royal Air Force stations in Scotland RAF Benbecula RAF Kirknewton RAF Lossiemouth RAF Tain