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

AFMAN 11-217V1 3 JANUARY 2005 167
Figure 8.12. True ILS Approach.
8.5.2.1.6.6. PAR, ASR, and Radar Vectors. When being radar vectored in the
vicinity of an airport using true north as a heading reference, all vectors will
be issued in true headings. If your aircraft does not allow selection of true
north as a heading reference, corrections for magnetic variation are
required.
8.5.3. Grid Approach Procedures. In some cases a NAVAID may be oriented on grid
north, or a grid final approach course may be published alongside a magnetic or true final
approach course. Use the following general procedures to fly a grid approach. Consult
your aircraft flight manual and MAJCOM directives for specific equipment, procedures,
and crew complement to fly grid.