| Clue | Length | Answer |
|---|---|---|
| radio beacon | 4 letters | sign |
| radio beacon | 4 letters | wink |
| radio beacon | 5 letters | touch |
| radio beacon | 5 letters | radar |
| radio beacon | 5 letters | pylon |
| radio beacon | 5 letters | sonar |
| radio beacon | 6 letters | shoran |
| radio beacon | 6 letters | rocket |
| radio beacon | 6 letters | signal |
| radio beacon | 6 letters | wigwag |
| radio beacon | 7 letters | sextant |
| radio beacon | 8 letters | radiator |
| radio beacon | 8 letters | red-flag |
| radio beacon | 9 letters | red-light |
| radio beacon | 9 letters | semaphore |
| radio beacon | 9 letters | wind-sock |
| radio beacon | 10 letters | stop-light |
| radio beacon | 10 letters | white-flag |
| radio beacon | 11 letters | transmitter |
| radio beacon | 12 letters | roman-candle |
| radio beacon | 13 letters | traffic-light |
| radio beacon | 17 letters | radio-transmitter |
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