Related Clues:

• Navigational aid needed when girl's stuck between rivers
• Radio detection
• Sort of speed trap caught girl in posh car
• Detector of nitrogen in plants shooting up
• Use of high-powered radio pulses for locating objects
• Detection method that rises as it falls
• Device for locating woman embraced by bishop
• System for the detection of objects under water
• Radio detection system
• It detects vehicle approaching in either direction
• Equipment carried by sailors on a raft
• Remote detection system
• Way of locating cycling crime?
• Ocean tracker
• Burghoff's memorable role