The maritime industry is entering a GNSS‑denied era
Two recent announcements signal a major shift:
- ANELLO Photonics promoting navigation‑grade photonic INS
- VIAVI and Ground Control launching LEO‑based resilient PNT for vessels
Both companies are responding to the same reality:
GNSS is no longer a reliable single point of truth.
Jamming, spoofing, multipath, and interference are now routine — not theoretical.
Vessels need additional sensors to maintain navigation when GPS is degraded or denied.
But this raises a new problem:
More sensors do not automatically create more truth.
They create more data — and more opportunities for disagreement.
This is exactly where GeoWatch fits.
Navigation systems tell you where you are.
GeoWatch tells you whether that position is physically possible.
INS, alt‑GNSS, and LEO timing systems are designed for continuity:
- keep navigating when GPS is lost
- provide a secondary position source
- maintain timing and heading
- reduce reliance on a single satellite constellation
But they do not detect:
- spoofing
- false motion
- GPS/INS inconsistencies
- heading mismatches
- impossible accelerations
- sudden jumps or freezes
They simply continue navigating.
GeoWatch is the independent physics‑based layer that monitors all motion sources and flags inconsistencies in real time.
Why GeoWatch becomes more valuable as resilient PNT grows
1. More sensors = more need for cross‑validation
A vessel may soon have:
- GPS
- alt‑GNSS (LEO‑based)
- INS
- Doppler log
- Radar tracks
- AIS
- IMU
Each provides a different view of motion.
GeoWatch becomes the arbiter that checks whether they agree with each other — and with physics.
2. INS and alt‑GNSS do not detect deception
They help you navigate through a spoofing attack.
They do not tell you that the attack is happening.
GeoWatch does.
3. IMU drift is irrelevant for short‑window integrity checks
High‑end INS systems emphasize long‑term drift performance.
GeoWatch uses 1–10 second windows, where even low‑cost IMUs are extremely accurate.
This is the perfect use of inertial data:
- short‑term truth
- instant spoofing detection
- physics‑based validation
GeoWatch is not a navigation engine — it’s a motion‑integrity engine.
4. Operators need explainable alerts, not black‑box navigation
INS and alt‑GNSS are complex systems.
When something goes wrong, they don’t explain why.
GeoWatch provides:
- clear, operator‑friendly alerts
- visualizations of motion inconsistencies
- explanations grounded in vessel physics
- evidence for post‑event analysis
This is essential for safety, compliance, and trust.
The strategic truth: GeoWatch is the integrity layer in a multi‑PNT world
As the industry moves toward:
- GNSS‑denied operations
- resilient PNT
- multi‑sensor navigation
- LEO‑based timing
- high‑grade INS adoption
…the missing piece is verification.
GeoWatch fills that gap by providing:
- spoofing detection
- impossible‑motion detection
- cross‑sensor consistency checks
- physics‑based truth
- operator‑explainable alerts
GeoWatch doesn’t compete with ANELLO, VIAVI, or Ground Control.
It complements them — and becomes more valuable as they grow.
GeoWatch is the motion‑integrity layer for a GNSS‑denied world.
Navigation systems tell you where you are.
GeoWatch tells you whether that motion is real.
In an era of contested PNT, that distinction is everything.