The AT-741B/B is designed for use with DME, Tacan and Beacon sets. The antenna is manufactured to Military Specifications MIL-A-25708 and MIL-A-25708/1 and qualified environmentally to MIL-STD-810. It operates within a temperature range of -55°C to 250°C (-67° to 482°F) and can withstand a static load of 15 psi perpendicular to the blade. The antenna is operational to altitudes of 100,000' and is finished with a Skydrol resistant lusterless black polyurethane coating.