Related Clues:

• Range-finding apparatus
• Pitching scout's device
• "M*A*S*H" character
• Speed trap method
• Radiolocation apparatus
• Locating system
• Either way it will catch you speeding
• Locating system either way
• Early warning system
• Navigational aid needed when girl's stuck between rivers
• Radio detection
• Sort of speed trap caught girl in posh car
• Use of high-powered radio pulses for locating objects
• A long-range radio-navigation system
• Detection method that rises as it falls