Areas near actual combat or other military emergencies are generally designated as restricted airspace.
Local flight service facilities maintain current schedules and contacts for the agency controlling each MOA.
MOA's are often positioned over isolated, rural areas to provide ground separation for any noise nuisance or potential accident debris.
Military pilots do, on occasion, underfly their prescribed MOA at lower altitudes without warning.
Additionally, prior to entering an active MOA, pilots are encouraged to contact the controlling agency for traffic advisories due to the frequently changing status of these areas.