1. Missed approach ([[5 C's (Going Missed)]]) 2. Airspeed changes more than 10 knots or 5 percent 3. Reaching a holding fix 4. [[VFR-On-Top]] altitude change 5. ETA change more than 3 minutes (no radar) 6. Leaving a holding fix 7. Outer marker inbound (no radar) 8. Unforecast weather 9. Safety of flight issues 10. Vacating an altitude 11. Final approach fix inbound (no radar) 12. Radio or nav failures 13. [[designated reporting point|Compulsory reporting points]] (no radar) 14. 500 FPM climb or descent unable. #acronym