Avionics, namely, HF, VHF, and VHR transceivers, ADF, VHF, and GPS receivers; L-band transponders; search and rescue equipment, namely, beacons and transceivers; aeronautical radio communication machines and apparatus; and namely, loudspeakers; microphones; amphliphiers; digital and analogue audio and video players, for aircraft and naval passengers addressing, briefing and entertaining