| Answer | Crossword Clue |
|---|---|
| SONAR | Underwater device |
| SCUBA | Underwater device |
| SONAR | Underwater location device |
| SONAR | Underwater electronic device. |
| SONAR | Underwater detection device |
| SONAR | Underwater sound device |
| SONAR | Underwater search device |
| SONAR | Underwater detection device. |
| OTTER | Underwater device for severing mines. |
| SONAR | Device for locating underwater objects. |
| PARAVANE | Device for protection from underwater mines. |
| PARAVANE | Underwater device used in mined areas. |
