User Guide

190-00368-06 Rev. A Garmin G1000 Pilot’s Training Guide Instructor’s Reference 5
5. When filling a flight plan, what suffix is used for a current Global Positioning System (GPS)
database with WAAS?
“/G” is the suffix used for GPS flight plans.
6. What are the position accuracy improvements with the WAAS?
TSO-C129a systems:
• Horizontal position accuracy ≈ 50 feet (15m)
• Vertical position accuracy ≈ 74 feet (23m)
• GPS position update rate = 1 Hz
TSO-C146a systems:
• Horizontal position accuracy < 10 feet (3m)
• Vertical position accuracy < 15 feet (4.5m)
• GPS position update rate = 5 Hz
7. Describe the differences between fly-by and fly-over GPS waypoints and draw their
respective symbols.
Fly-by waypoints allow for turn anticipation, whereas fly-over waypoints must be
crossed, most often due to terrain clearance issues. Both symbols can be found on
approach plates.
8. What does RAIM stand for? Describe its purpose and relationship with WAAS GPS receivers.
Receiver Autonomous Integrity Monitoring provides integrity check capability to ensure
the safe use of GPS for IFR flight operations (see AIM for drawing verification). The only
time RAIM prediction is needed for TSO-C146a systems is when WAAS is not available.