passive direction finding (PDF)
пасивний пеленгатор
пасивний пеленгатор
principal direction of fire (PDF)
multifunctional radio control, direction finding and suppression system (portable) (MKRPP)
automatic direction-finding equipment
equisignal method (of direction finding)
projectile disassembly facility (PDF)
propellant disposition facility (PDF)
automated target detection, tracking, co-ordinate finding and interceptor guidance system