Related Clues:

• Measuring device that locates distant objects
• Tool for meteorologists
• Speeder's undoing
• Echolocation apparatus
• Storm-finding system
• One picking up speed, say?
• Storm-tracking device
• Astronomer's tool
• Tracking system
• Tracker's tool
• Airport tracking device
• Meteorological aid
• Speeder detector
• Traffic controllers' device
• Motion detector, e.g