StacksVerified U.S. regulatory reference

14 CFR §25.1547

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (a)A placard meeting the requirements of this section must be installed on, or near, the magnetic direction indicator.
  2. (b)The placard must show the calibration of the instrument in level flight with the engines operating.
  3. (c)The placard must state whether the calibration was made with radio receivers on or off.
  4. (d)Each calibration reading must be in terms of magnetic heading in not more than 45 degree increments.