This specification covers the requirements for test: equipment required totest, align , calhbrate, maintain, and check out TACAN Shipboaad groud Radio Sets ANAlRN-3, ANAlRN-3A, AN/GRN-9, AN/GRN-9AY AN/GRN-9BY m/GW-dc, AWGRN-gD, AN/SRN-ó, AN/SRN-6AY the antenna, monitor (Mx-1627/ Uw-3/Mx-2229/GM-34) , and transfer equipment (AN/GRA-34) . %