TM 1-1520-238T-10 GLOSSARY (cont) GLOSSARY (cont) ARBR DEFINITION EGI embedded gps/inertial EC end cap ECS environmental control location system system ECU engine torque unit EFF effectivity EGT engine gas temperature EICE engine anti-ice EL elevation ELEC electrical ELEX electronics EMERG emergency EMI electromagnetic interference EMP empty EN encoded ENA enable ENCU environmental control unit ENG engine EO video EQ audio junction box ESC external stores controller ESS essential EXC excitation EXCIT excitation EXST external stores EXT exterior EXT external EXTGH extinguisher EXTINGH extinguisher EXTR exterior FAB forward avionics bay FC fire control ARBR DEFINITION FCC fire control computer FCP fire control panel FD/LS fault detection and FL filter FLIR forward looking infrared radar FLT flight FLTR filter FM frequency modulation FORM formation FOV field of view FT front FWD forward G generator GCB gun control box GCU generator control unit GEN generator GND ground GOV governor GPS global positioning system GRBX gearbox GRN green GRY gray GS fuselage station GS ground stud/module H hydraulic accumulator H.V. high voltage HORIZ horizontal HARN harness HARS heading and attitude reference set HDD heads down display HDG heading Glossary 4 Change 5