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

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AFMAN 11-217V1 3 JANUARY 2005
7.12.3.8.1.1.1. NOTE: The charted DME facility that establishes the
DME fix is the only acceptable facility to use as an active WP. If this
facility is not in the airborne database, do not use the facility WP for this
operation. If the named fix is selected as the active GPS WP, consider
yourself over the fix when the GPS system indicates you are at the active
WP.
7.12.3.8.1.2. If the fix is identified by a five-letter name, which is not
contained in the GPS airborne database, or if the fix is not named, select the
facility establishing the DME fix or another named DME fix as the active
GPS WP. If selecting the DME providing facility as the active GPS WP,
consider yourself over the fix when the GPS distance from the active WP
equals the charted DME value and you are on the appropriate bearing and
course.
7.12.3.8.1.2.1. NOTE: Until all DME sources are in the database, pilots
may use a named DME fix as the active waypoint in lieu of using the
DME source. If using this method the named DME fix must be on the
same course and based on the same underlying DME source. Pilots
should be extremely careful to ensure correct distance measurements are
used when utilizing this method. Pilots should review distances for DME
fixing during preflight preparation.
7.12.3.8.2. Flying a DME arc:
7.12.3.8.2.1. Select the DME facility from the airborne database as the
active WP. If this facility is not in your database, do not perform this
operation.
7.12.3.8.2.1.1. Use GPS distance to the WP in lieu of DME.
7.12.3.8.3. Select CDI terminal sensitivity (+- 1 nm) if in the terminal area.
Determining position over an NDB/compass locator
7.12.3.8.3.1. Select the charted NDB/compass locator from database as
active WP. If facility is not in the airborne database, do not use a facility WP
for this operation.
7.12.3.8.3.2. Select CDI terminal sensitivity (+- 1 nm) if in the terminal area
7.12.3.8.3.3. You are over the NDB/compass locator when the GPS system
indicates you are over the active WP.
7.12.3.8.4. Determining position over a fix made up of an NDB/compass locator
bearing crossing a VOR/LOC course.
7.12.3.8.4.1. A fix made up by a crossing NDB/compass locator bearing will
be identified by a five-letter fix name. Select either the named fix, or the
NDB/compass locator facility providing the crossing bearing to establish the
fix as the active GPS WP. If the facility is not in your airborne database, do
not use a facility WP for this operation.
7.12.3.8.4.2. If using the named fix, fix passage is when indicated by the GPS