Intelligence Preparation of the Battlefield - Federation of American ...

FM 34-130
less restricted by the presence of obstacles or hindering terrain and prefer areas that provide
concealment and cover.
Similarly, the mobility corridor used by a jet aircraft with a minimum operating altitude of
1,000 feet is quite different from that considered by a helicopter with a maximum service
ceiling of 12,000 feet.
Depict mobility corridors and zones of entry (see Figure 2-8) on overlays and sketches using
simple, easily recognized symbols. See Chapter 3 for examples. If using colored graphics,
use red when focusing on threat mobility or blue when the attention is on friendly force
mobility. Ensure that any nonstandard symbols are explained in the graphic’s legend.
Categorize Mobility Corridors:
Once you have identified mobility corridors, categorize them by the size or type of force they
will accommodate. You may prioritize them in order of likely use if warranted. For
example, because military units generally require logistical sustainment, a mobility corridor
through UNRESTRICTED terrain supported by a road network is generally more desirable
than one through RESTRICTED terrain or one unsupported by a road network.
Normally, identify mobility corridors for forces two echelons below the friendly command.
This varies with each situation. Where the terrain is restrictive, allowing only relatively
small mobility corridors, you may need to evaluate mobility corridors several echelons below
the friendly command.
Group Mobility Corridors to Form Avenues of Approach:
Group mobility corridors together to form AAs. An AA must provide ease of movement and
enough width for dispersion of a force large enough to significantly affect the outcome of an
operation.
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