EASA NAV(A)intermediate
A GPS tracking display uses a vertical bar and dots to show deviation from the next waypoint. What does bar displacement indicate?
Answer
Track error as absolute distance in NM; full-scale depends on operating mode
Explanation
The GPS bar indicates lateral track error as distance, commonly in nautical miles. The full-scale sensitivity depends on the selected operating mode, so a fixed ±10 NM or angular scale should not be assumed. **Key takeaway:** Interpret the deviation scale using the active GPS mode. **Glossary:** **Track error**: Lateral distance from desired track; **full-scale deflection**: Maximum displayed deviation.
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