Special Aerospace Defence Exercise (SPADE)
Special Aerospace Defence Exercise (SPADE) : The flight of one or more military aircraft on a NOPAR (do not pass to air defence radar) IFR flight plan (FP) to conduct a test of the aerospace surveillance, detection and identification capability. If identification by interception of these aircraft is also planned, it shall be contingent upon the approval of a prearranged altitude reservation prior to takeoff. See also: Air Sovereignty Test