- Missed approach - Airspeed changes more than 10 knots or 5 percent - Reaching a holding fix - VFR-on-top altitude change - ETA change more than 3 minutes (no radar) - Leaving a holding fix - Outer marker inbound (no radar) - Unforecast weather - Safety of flight issues - Vacating an altitude - Final approach fix inbound (no radar) - Radio or nav failures - [[designated reporting point|Compulsory reporting points]] (no radar) - 500 FPM climb or descent unable. #acronym