| avia., amer. |
Airspace classified as: a Class F advisory CYA, Class F restricted CYR or Class F danger CYD, which can be controlled airspace, uncontrolled airspace ora combination of both; b military operations area MOA, below FL 180 in the U.S.; c ATC-assigned airspace Military Area ATCAA FL 180 and above in the U.S.; d airspace restricted by NOTAM for forest fire aircraft operating restrictions; and e other airspace restricted by NOTAM to cover specific situations such as oil-well fires, disaster areas, etc. |
