Planning Minima for Instrument Flight Rule (IFR) Flights

The operator shall only select an aerodrome as a takeoff alternate aerodrome when the appropriate weather reports and/or forecasts indicate that, during a period commencing one hour before and ending one hour after the estimated time of arrival at the aerodrome, the weather conditions will be at or above the applicable landing minima.

The ceiling shall be considered when the only approach operations available are non-precision approaches (NPA) and/or circling operations. Any limitation related to OEI operations should also be considered.

All NPAs and approcahes with Vertical guidance (APV) using Barometic altimetry are Type A approach operations.

Instrument approach operations shall be classified based on the designed lowest operating minima below which an approach operation shall only be continued with the required visual reference as follows:

a) Type A: a minimum descent height or decision height at or above 75 m (250 ft); and
b) Type B: a decision height below 75 m (250 ft). Type B instrument approach operations are categorized as:

1) Category I (CAT I): a decision height not lower than 60 m (200 ft) and with either a visibility not less than 800 m or a runway visual range not less than 550 m;
2) Category II (CAT II): a decision height lower than 60 m (200 ft) but not lower than 30 m (100 ft) and a runway visual range not less than 300 m;
3) Category IIIA (CAT IIIA): a decision Height (DH) lower than 30 m (100 ft) or no Decision Height (DH) and a runway visual range not less than 175 m;
4) Category IIIB (CAT IIIB): a decision Height (DH) lower than 15 m (50 ft) or no decision height and a runway visual range less than 175 m but not less than 50 m;
5) Category IIIC (CAT IIIC): no decision Height (DH) and no runway visual range limitations.