Meanings

pneumatic tube

pre-recorded broadcast

land transportation

escort ship

police van

transfer (of passengers or freight)

stereophonic broadcast

to send (something) unsolicited

including postage

broadcasting network

radio jamming

carrier frequency

freight traffic (transportation)

marine transportation routes

convoy (of ships)

(announcement over) the public address system (e.g. in stadium)

late-night broadcasting

addressee

long-distance transportation

forwarding