Related Clues:

• Sub system
• Clerk of the 4077th
• Underwater sound device
• Burghoff role in "M*A*S*H"
• Company clerk of classic TV
• Fish tracker
• Control-tower device
• Echo analyzer
• Blip displayer
• It can detect destroyers
• Shower shower?
• 'M*A*S*H' clerk
• Detection technology
• Tracking device
• Doppler device