FAQ Archive
GPSController FAQs - Page 184
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FAQ
Can dead reckoning maintain ELD compliance in GPS dead zones?
No, dead reckoning cannot maintain Electronic Logging Device compliance in GPS-denied zones. ELD rules require reliable location recording, and dead reckoning provides only estimates, not verified positions. If GPS gaps...
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How accurate is dead reckoning when GPS fails for fleet vehicles?
Dead reckoning accuracy degrades over time without GPS signals, with error building at roughly 1-3% of the distance traveled. For example, a 5-minute drive through a tunnel at 60 km/h could result in position errors of 1...
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When should we implement alternative tracking approaches instead of trying to fix AIS issues internally?
You should change your approach when the lack of AIS data prevents you from meeting mandatory reporting requirements for the zone you're in. If you can't generate compliant position logs for authorities, internal softwar...
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Why is AIS signal loss particularly problematic for maritime operations in 2026?
In 2026, evolving regional conflicts and advanced electronic warfare tactics have made AIS jamming and spoofing more common. Additionally, compliance regimes for maritime safety and sanctioned zones increasingly demand u...
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Can we use a vessel's internal GPS when AIS is down for fleet tracking?
No, the vessel's internal GPS might still work for crew navigation, but that data isn't broadcast to your fleet management software or other vessels. For central fleet management, it's as if the vessel has disappeared, a...
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What happens to fleet management software when AIS signals go dark in conflict zones?
When AIS signals go dark, your fleet management software effectively stops being a live command center and becomes a historical data log. The software freezes the vessel's last reported position, and all automated alerts...
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Why do standard commercial anti-jamming devices fail against jamming in the Strait of Hormuz?
Standard devices often fail because they can't handle frequency-hopping jammers that switch signals faster than filters can adapt. Additionally, in the mountainous terrain around Hormuz, jamming signals reflect off landm...
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Why can't ships rely solely on inertial navigation systems when GPS fails in the Strait of Hormuz?
Inertial navigation systems (INS) drift over time—about 1 nautical mile per hour without GPS correction. For prolonged transit through a narrow strait like Hormuz, this error accumulates to dangerous levels, making INS u...
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What is the biggest compliance risk from GPS jamming when transiting regulated straits?
The biggest compliance risk is an inaccurate Automatic Identification System (AIS) track. Authorities use this log to verify you stayed in the designated transit corridor. Jamming-induced position jumps can make it appea...
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How can I distinguish between GPS jamming and just a weak GPS signal on my vessel?
Jamming causes a total loss of all GPS satellites simultaneously on your tracker's status page, while a weak signal usually shows a gradual drop of individual satellites. You might also see a constant, high carrier-to-no...
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What type of anti-jamming device is most effective against sophisticated jamming in the Strait of Hormuz?
For guaranteed operation in the Strait of Hormuz in 2026, you need a modern Controlled Reception Pattern Antenna (CRPA) system that uses spatial filtering to physically block signals from hostile directions. This should...
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What happens if both GPS and BeiDou signals are jammed simultaneously?
If both systems are jammed, a good telematics device switches to inertial measurement (dead reckoning using sensors) and cell tower triangulation. The GPS Controller should immediately flag a high-priority 'total GNSS lo...
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