3-67. While the above focuses on planning at the theater level, AMD planning is being performed concurrently at all subordinate echelons of command. Resident ADA personnel, in conjunction with the protection and/or fires cell personnel, consider the echelon’s assets that that commander deems critical and begin to plan protection requirements. Allocated or organic ADA forces are assigned missions in defense of these assets. Adjustments are made to the assignment of forces to an asset or the assets to be defended based on ADA force availability. Additional ADA assets may be requested as required. If active AMD capabilities (shooters) are unavailable, planners consider the use of passive defense measures in lieu thereof. Continuous coordination is conducted by all entities to ensure the protection of critical assets and forces from air and missile attack and surveillance.