TM   11-5820-890-10-1 ABBREVIATIONS. Continued ABBREVIATION TERM GD HI HR HUB HZ ICM ID IF IN INIT KEK KG KHZ LB LD LO LOS LOUT LR LR/LR M MAN MHZ MP NCS NRI OFST OW PA PAM PM PMCS PT PTT PWR RAD RCU RCV REC REM RF good high hand  receipt hold  up  battery hertz intercom identification intermediate  frequency inch initiate key encryption key (COMSEC key) kilogram kilohertz pound load low line-of-sight lockout long range long  range/long  range medium manual megahertz manpack net control station net  radio  interface offset "order   wire" power  amplifier pamphlet permanent  memory preventive  maintenance  checks  and  services plain text push-to-talk power radio remote  control  unit receive receive remote radio  frequency E-3