London's Air Ambulance its second MD 902, registration G-LNDN. Built in 2008, the aircraft was previously registered in Qatar as A7-NHA. In addition to the standard livery, it bears the masonic Square and Compasses symbol on each side, with the words "London Freemasons" lettered under the doors, to reflect the significant funding from the organisation. At night or when the helicopters are offline the medical crew, including a paramedic and senior trauma doctor, still respond to emergencies, but travel in a specially equipped rapid response car. The six cars, Škoda Octavias and also Škoda Superbs, occasionally operate during the day, carrying backup medical
.500 A-Square 8127 ft lbf (11019 J). In comparison: the parent cartridge, the .460 Weatherby Magnum as commercial loaded with a 500 gr (32.4 g) Monolithic Solid has a muzzle velocity of 2580 ft/s (786 m/s) and muzzle energy of 7389 ft lbf (10018 J). The .50 BMG as commercial loaded with a 661 gr (42.8 g) FMJ M33 ball ammo has a muzzle velocity of 2750 ft/s (838 m/s) and muzzle energy of 11102 ft lbf (15052 J). Although there is limited hand-loading information, bullet weights (hunting) are from between 300 gr (19.4) to 647 gr (41.9). In October 2011, A-Square