Whenever an extremely dangerous situation exists, the dispatcher shall immediately clear the air for emergency traffic only. The dispatcher will turn on the marker tone. This activation of the intermittent marker tone will indicate to everyone on the channel that an extremely dangerous situation exists.
If an officer is aware of an extremely dangerous situation which the dispatcher is not aware of, then the officer shall clear the air for emergency traffic only. The officer has the discretion of clearing the air whenever it is deemed necessary.
Until this extremely dangerous situation is resolved, the air should remain clear. As soon as the situation is secure, the officer shall give a “signal 88” to the radio dispatcher and the air will be returned to normal. The marker tone will be deactivated and air will resume to normal.