NOTE: Consider separation to exist when the estimated positions of the aircraft being separated are never less than a prescribed minimum.
NOTE: Refer to para 1-2-2, Course Definitions.
The use of Mach number technique allows for the application of reduced longitudinal separation minima. The following conditions must be met when the Mach number technique is being applied:
NOTE: A “rule-of-thumb” may be applied to assist in providing the required estimated spacing over the oceanic exit point when either conflict probe is not in use or when requested by another facility. This rule-of-thumb can be stated as follows: For each 600 NM in distance between the entry and exit points of the area where the Mach Number Technique is used, add 1 minute for each 0.01 difference in Mach number for the two aircraft concerned to compensate for the fact that the second aircraft is overtaking the first aircraft. (See TBL 8-3-1.)
|Difference in Mach||Distance to Fly and Separation (in Minutes) Required at Entry Point|
|001-600 NM||601-1200 NM||1201-1800 NM||1801-2400 NM||2401-3000 NM|