Related Clues:

• Tiny amount
• Sonar signal
• Submarine, on sonar
• Radar signal
• Sonar spot
• Spot on a radar screen
• Glitch
• Radar sighting
• Tiny percentage in the polls
• Radar screen image
• Minor interruption
• Irregularity
• Air traffic screen sight
• Radar screen dot
• It's monitored by an air traffic controller