Related Clues:

• Dolphin detector
• Orienteering aid
• School locator
• 'M*A*S*H' character
• Ping producer
• Sub device
• Speeder spotter
• See 14-Down
• Sub standard?
• Word with road or weather
• A school might be found using it
• Submarine tracker
• Mall aid
• Navigating aid
• Plot (out)