Flashing, signal, instructions, dashes, steady, acknowledge, relay, code

1. A communication relay is a station that … messages between various points, so as to facilitate communications between units. 2. The idea of flashing dots and … from a lantern was first put in to practice by Captain, later Vice Admiral, Philip Colomb in 1867. 3. His original…, which the Navy used for seven years, was not identical with Morse, but Morse code was eventually adopted with the addition of several special signals. 4. … lights were the second generation of signalling in the Royal Navy, after the flag signals. 5. In air traffic control towers,... lamps are still used today, as a backup device in case of a complete failure of an aircraft's radio. 6. Light signals can be red, green or white, and … or flashing. 7. Messages are limited to a handful of basic … (e.g. "land", "stop" etc.); they are not intended to be used for transmitting messages in Morse code. 8. Aircraft can... signals by rocking their wings or flashing their landing lights.

Вспомните функции модальных глаголов и особенности их перевода на русский язык.