TM 1-1520-238T-10 GLOSSARY (cont) GLOSSARY (cont) ARBR DEFINITION TV television TWHL tail wheel TX transmitter UHF ultra high frequency UPDT update UTIL utility V variable VAC volts alternating current VDC volts direct current VDI voltage discrete input VDO voltage discrete output VDU video display unit VEL velocity VERT vertical VHF very high frequency VIB vibration VID video VIO violet VLV valve VOLT voltage VOR variable omni range VT total true airspeed Vvt lateral airspeed Vx voltage x Vxt longitudinal airspeed Vy voltage y W bus bar W watt W ware harness W/O without ARBR DEFINITION WARN warning WAS weapon action switch WFOV wide field of view WHT white WICE windshield anti-ice WL water line WPN weapon WPR wiper WRN warning WSHLD windshield X10 multiply by 10 XDCR transducer XDS lamp assembly XF fuse socket/holder XFEED cross feed XFER transfer XFMR transformer XFR transfer XJ jumper cable-connector XK relay socket/holder XMIT transmit XMSN transmission XMTR transmitter XOVER crossover XP jumper cable-connector YEL yellow ZFOV zoom field of view Glossary 10 Change 5