"TACAN (TACTICAL AIR COMMUNICATION AND NAVIGATION) SYSTEM PROVIDES BEARING AND DISTANCE INFORMATION TO AIRCRAFT FROM GROUP; 1-PHASE,3-WIRE 120VAC OR 3-PHASE,4-WIRE 208 VAC;47 TO 63 HZ;ALL SOLID STATE;INDEPENDENT PRECISION AZIMUTH CALIBRATOR;MODULAR;C/O INPUT-OUTPUT TERMINAL 2,PRINTER 1,REMOTE DIGITAL DATA MODEM 1, TACAN ANTENNA 2,CONTROL-INDICATOR 1,TRANSPONDER GROUP1"