Related Clues:
- Ship's tracking device
- ... noises on arrival will reveal sound equipment
- Presumably echoes what old bats are capable of with business partner from America opening restaurant
- Modern navigation tool
- It finds things underwater new in Leicestershire river
- Whale facility
- Bats' navigational tool
- Sub sounder
- Salvage ship's detection system
- Technique using underwater acoustics
- Fish-tracking aid
- Detection device that can confuse whales
- Echo sounder — arson (anag)
- Salvage ship's gear
- Bats navigate by it