Related Clues:
- Nautical acronym
- Ship spotter
- Car-trip reference
- Ship-locating system
- Positioning system
- Navigation technology
- Ship-finding acronym
- GPS forerunner
- GPS precursor
- Radio-based navigational system
- What the navigator may need
- Navigation system
- A long-range radio-navigation system
- Book containing lots of legends?
- Collection of state highway maps