CAP Border Zone Communications & Altitude Restrictions

Ref: CAP Altitude & Geographic Restrictions

International treaties restrict the use of some CAP frequencies in the Border Zones shown on this map. The northern Canadian border zone is defined by “Line A”, the Alaskan by "Line C", and Mexico Sharing Zone which are shown on this map. Special restriction circles are shown by clicking the checkboxes in the text descriptions. The following altitude restrictions apply until further notice: