Related Clues:

• Kind of screen
• Cave
• Sub's 'ears'
• It picks up readings
• Item on a sub
• Echolocation device
• Destroyer detector
• Kind of gun
• Gillette brand
• 'M*A*S*H' corporal
• Speeder's downfall
• Bat's home
• Salvager's system
• Traffic tool
• Kind of beacon