DOD failing to track progress on military alternatives to GPS, GAO says - FCW
US Department of Transportation Seeking Alternatives to Advanced Navigation GPS | Blogs | Altium
New Alternatives to GPS - Power & Motoryacht
Takeaways from the DOT study of GPS alternatives - NextNav
infsoft Blog: Techniques for Indoor Positioning Without GPS
Defense Department Moves to Augment GPS with Alternatives | FedTech Magazine
Developing an Alternative To GPS with a HackRF
Alternatives to GPS - GPS
Is there any alternative to GPS tracking? – Vamosys
The search for GPS alternatives shouldn't be a zero-sum game - NextNav
5 Cheap GPS Alternatives | Fox Business
5 Cheap GPS Alternatives | Fox Business
White House, DoT Promote More Dough For GPS Alternatives - Breaking Defense
Takeaways from the DOT study of GPS alternatives - NextNav
GPS Alternatives: DOD is Developing Navigation Systems but is Not Measuring Overall Progress | U.S. GAO
The GPS wars have begun | TechCrunch
Ground-based alternative to GPS achieves 10 cm accuracy – Physics World
Honeywell Developing Multiple Options For GPS-denied Navigation | Aviation Week Network
The Top 6 Verizon Connect Alternatives Available on the Mark | GPSWOX
Explainer: NavIC, India's home-grown alternative to the GPS navigation system | Reuters
Honeywell pushes development of alternatives to GPS | News | Flight Global
Map sources - Commercial and alternative GPS outdoor maps for Garmin device | TerraHunt
GAO: Pentagon Lacks Business Case for GPS Alternatives
 "NavIC, India's Home-Grown Alternative To The GPS Navigation System")
NavIC, India's Home-Grown Alternative To The GPS Navigation System
