FAQ Archive
GPSController FAQs - Page 273
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FAQ
Can GPS signals actually be jammed for commercial fleets in regions like the Persian Gulf?
Yes, regional actors use commercially available jammers that can drown out standard GPS signals across wide areas. This causes location drift, stale data, and complete blackouts for devices relying solely on one constell...
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What is multi-constellation GPS tracking and why is it important for fleets?
Multi-constellation GPS tracking uses multiple global satellite networks—like GPS, GLONASS, Galileo, and BeiDou—simultaneously to ensure continuous location data. It automatically switches sources if one is jammed or una...
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What are common mistakes when configuring dead reckoning backup systems?
Common mistakes include assuming INS is 'set and forget' without proper calibration, failing to set correct vehicle profiles (different vehicles behave differently), not defining clear fallback logic for GPS re-acquisiti...
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What causes the 'location jump' when GPS signal returns after an outage?
The location jump occurs when the INS-estimated position has drifted from the true location and the system instantly corrects to the fresh, accurate GPS fix. Better systems use smoothing algorithms to minimize this disru...
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How long can INS dead reckoning provide accurate positioning without GPS?
In optimal conditions with high-quality sensors, INS dead reckoning can provide useful positioning for 3 to 10 minutes. However, accuracy degrades over time due to sensor drift, making it a short-term bridge rather than...
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How does INS dead reckoning work when GPS signal is lost?
INS dead reckoning uses internal sensors like accelerometers and gyroscopes to calculate a vehicle's position based on its last known GPS fix, speed, heading, and time elapsed. It maintains positioning by estimating move...
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When should a company consider replacing its entire vessel tracking system rather than just reconfiguring it?
Replacement becomes critical when latency is systemic (not just connection issues), when the system cannot provide a unified audit trail for compliance investigations, or when it fails to integrate new data sources like...
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What are the key limitations of geofencing for maritime rerouting situations?
Geofencing is an alert tool, not a control solution. While it can warn a vessel about approaching danger zones, it cannot dynamically calculate and transmit a safe, fuel-efficient, and compliant alternative route. Effect...
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How can delayed rerouting commands affect maritime compliance and insurance?
Delayed commands create discrepancies between a vessel's logged planned route (filed with authorities) and its actual track. This can lead to violations of coastal state reporting requirements, serious sanctions complian...
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What is the main cause of GPS signal delay for ships in high-risk areas like the Strait of Hormuz?
The primary cause isn't the GPS constellation itself, but the multi-hop data pathway: satellite GPS signal to ship's receiver, then to onboard terminal, through commercial satellite network, to shore-based server, to dec...
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What's the final sign that a shipping fleet needs a dedicated anti-spoofing solution?
When the cost of one major incident—including fines, ransom, lost cargo, and compliance violations—exceeds the cost of implementing a system that cryptographically verifies every position fix before any other navigation...
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Can ships rely solely on inertial navigation systems instead of GPS to avoid spoofing?
No, inertial systems drift and require periodic GPS correction to stay accurate. If the GPS signal feeding the inertial system is fake, it corrupts the system's calibration and makes the navigation error worse, not bette...
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