| Answer | Crossword Clue |
|---|---|
| FLARE | Signaling device |
| SEMAPHORE | Signaling device |
| SIREN | Signaling device |
| BEEPER | Signaling device |
| SENSOR | Signaling device |
| SIREN | Signaling device. |
| ALDIS | ... lamp (signaling device) |
| PAGERJUICE | Electricity for a signaling device? |
| RADIOSONDE | Device for signaling weather data. |
| HELIO | Signaling device using sun's rays: Colloq. |
