Existing Military Operations Surface
The Existing Military Operations Surface (EMOS) is unique to Keesler AFB and
created to support training missions at Keesler AFB by developing airspace
criteria. It is used to identify height thresholds for structures in the navigable
airspace. The EMOS Area is a flat surface that extends from the thresholds of
the runway along the projection of the centerline, both southwest and
northeast for 1‐3/4 nautical miles.
The EMOS defines airspace criteria that are needed for the continuance of
the existing air mission. Figure 9 shows the EMOS for Keesler AFB as
developed by the City of Biloxi. This map is a graphical interpretation of the
EMOS developed from the definition provided by Keesler AFB and contains
deviations from the EMOS definition.
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