BY ORDER OF THE SECRETARY OF THE AIR FORCE AIR FORCE ...

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AFMAN 11-217V1 3 JANUARY 2005
Table 18.7. Allowable Altimeter Errors at Ground Checkpoint for Airports Above 3500
Feet Elevation or Atmospheric Pressure Lower Than Standard (Altimeter Range 0-50,000
Feet).
Airport Elevation Allowable Difference
2000 Feet ±100 Feet
3000 Feet ±105 Feet
4000 Feet ±115 Feet
5000 Feet ±125 Feet
6000 Feet ±135 Feet
7000 Feet ±145 Feet
8000 Feet ±155 Feet
9000 Feet ±165 Feet
10000 Feet ±175 Feet
11000 Feet ±185 Feet
12000 Feet ±195 Feet
13000 Feet ±205 Feet
14000 Feet ±215 Feet
15000 Feet ±225 Feet
18.6.8. Altimeter Use in Flight. Prior to take-off at least one altimeter will be set to the
latest QNH/QFE altimeter setting. Set the altimeter to QNE (29.92) climbing through
transition altitude. Prior to commencing the initial approach to an airfield, the
number of the transition level should be obtained from the appropriate air traffic
services unit. Obtain the latest QNH/QFE before descending below the transition level.
18.7. Units of Measure for Altitudes.
18.7.1. Some countries, particularly in Eastern Europe and nations of the former USSR,
use meters to define altitudes. Most USAF aircraft do not have altimeters that can
display meters. FLIP AP contains information on units of measure for each country. The
FIH has a conversion chart for feet to meters. It is imperative to correctly convert from
feet to meters when flying in these areas.
18.7.1.1. WARNING: In some areas you may be required to fly altitudes or flight
levels in meters and use an altimeter setting other than inches of mercury QNH. For
example, altitude in meters using millibars QFE. Misapplication of conversions in
these areas can cause mid-air collision or collision with the ground. Crews must
insure they are thoroughly familiar with their aircraft system limitations and
conversions prior to flight in these areas.