Related Clues:
- Submarine-detecting device
- Echolocation acronym
- Submarine sensing system
- System used on a sub
- Sunken-object detector
- Submarine locator
- Bat's detection tool
- Ship's aid (Issue One) with reverse
- Detector of meson, a research tool
- Fairy with opportunity for looking around
- System to locate underwater objects
- Underwater location equipment
- Sub's eye?
- System for locating underwater objects
- Submarine's eye?