Travis AFB Sustainability Study Report Final Sustainability Study Report | Page 60
Imaginary Surfaces Military Compatibility
Area (Figure 12)
The purpose of the Imaginary Surfaces MCA is to regulate the height of all
structures and buildings within the area defined by FAA guidance and
Air Force AICUZ instructions known as imaginary surfaces. The imaginary
surfaces are a 3‐D geographic area comprising approach and departure
airspace corridors and safety buffers. Vertical obstruction heights are a
major concern for flight operations and training due to the potential for a
structure to extend into navigable airspace, which could impede safe flight
operations and put both pilots and citizens on the ground at risk of an
aircraft accident. Vertical obstructions that can affect flight safety include,
but are not limited to, cell towers, power lines, wind turbines, buildings, and
trees. The imaginary surfaces are explained in more detail in Chapter 3,
Travis AFB Operations in the Background Report.
Land Military Compatibility Area (Figure 13)
The Land MCA is designed to capture lands adjacent to Travis AFB and is
more for awareness purposes to keep landowners informed of the
operations that may impact their quality of life. The Land MCA includes all
land within one mile of the boundary of Travis AFB.
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Recommendations