General Pages » Law » Part 91.405b

91.405 IFR alternate aerodrome requirement

(b) A pilot-in-command of an aircraft must not list any aerodrome as an alternate on the IFR flight plan under paragraph (a) unless the meteorological forecasts at the time of submitting the flight plan indicate that, at the estimated time of arrival at the alternate aerodrome, the ceiling and visibility at that aerodrome will be at or above the following meteorological minima—

• (1) if an instrument approach procedure with alternate minima has been published in the applicable AIP for the aerodrome, the specified alternate aerodrome minima for that instrument approach procedure; or
• (2) for a precision approach procedure, a ceiling of 600 feet, or 200 feet above DA/DH, whichever is the higher, and a visibility of 3000 metres, or 1000 metres more than the prescribed minimum, whichever is the greater; or
• (3) for a non-precision approach procedure, a ceiling of 800 feet, or 200 feet above MDA/MDH, whichever is the higher, and a visibility of 4000 metres, or 1500 metres more than the prescribed minimum, whichever is the greater; or
• (4) if an instrument approach procedure has not been published in the applicable AIP for the alternate aerodrome, the ceiling and visibility minima prescribed under Part 91 Subpart D for an air operation performed under VFR for descent below the minimum altitude for IFR flight prescribed under rule 91.423.