Related Clues:

• Old global positioning system
• Deep-sea fishing aid
• Many MDs
• Dash device
• Echolocation method
• Bass boat feature, sometimes
• Location identifier, for short
• HMO listing
• Sub locator
• Some drs.
• Point pinpointer: Abbr.
• Echo sounder
• Aid for lost souls, briefly?
• Modern navigation aid, for short
• Sub sensor