Ifr Quick-Review Sheet Pdf - When is an instrument rating required? 2,000ft above highest obstacle within 4nm of course. Web ifr cruising altitudes (based on magnetic course) (§91.179) ifr mi nimum altitudes minimum prescribed, or if none: (§91.177) ifr minimum fuel requirementsfile (§91.1 67) performance. 1,000ft above highest obstacle within 4nm of course. Under ifr or in weather conditions less than prescribed for vfr.
2,000ft above highest obstacle within 4nm of course. Web ifr cruising altitudes (based on magnetic course) (§91.179) ifr mi nimum altitudes minimum prescribed, or if none: (§91.177) ifr minimum fuel requirementsfile (§91.1 67) performance. When is an instrument rating required? 1,000ft above highest obstacle within 4nm of course. Under ifr or in weather conditions less than prescribed for vfr.