Related Clues:

• Auditor's old office had a detector
• Remote range sensor
• Burning vessel reported by this detecting device
• M.A.S.H. character; electronic range detector
• A help in locating girl in a car?
• Remote sensing system
• Echo-location system
• Remote detection device
• Underwater detector
• Locator of plane travelling there and back
• Electronic rangefinder
• Underwater detection device
• Electronic tracker
• Has a beam moving up and down
• Echo-sounding device