The AT-741B/B is an identification beacon antenna designed for use with Radar Interrogation. The antenna is constructed from an aluminum casting which is capable of withstanding particle erosion to speeds of up to Mach 2. This antenna is produced to Military Specifications MIL-DTL-25708 and is qualified environmentally to Military Standard MIL-STD-810. The antenna operates within a temperature range of -67°F to 300°F and can withstand a static load of 15 psi perpendicular to the blade. The antenna is operational to altitudes of 100,000 ft and is finished with a Skydrol resistant lusterless CARC black coating.