Document ID: chunk:federal_register_of_legislation:F2023C00696:body:0:p39
Version: federal_register_of_legislation:F2023C00696
Segment Type: other
Provision Reference: 
Character Range: 115133–126950

Mach Number Technique is used between aircraft:                                                                                                                                                                                                                Differ­ence in Mach No  Distance to fly and separation (in min) required at entry point
10 min                                                                                                                                                                                                                                           (a) on the same track and the aircraft have reported over a common point and 10 min will be maintained until another form of separation is established; or
Mach No. Technique                                                                                                                                                                                                                               (b) on converging tracks and it is confirmed that 10 min separation will exist at the point the aircraft enter lateral conflict and 10 min separation will be maintained until another form of separation is established.
000–600  NM                                                                                                                              601–1200  NM                                                                                          1201–1800  NM                                                                                                                                                                                                                                                      1801–2400  NM           2401–3000  NM
0.01                                                                                                                                     11                                                                                                    12                                                                                                                                                                                                                                                                 13                      14                                                                15
0.02                                                                                                                                     12                                                                                                    14                                                                                                                                                                                                                                                                 16                      18                                                                20
0.03                                                                                                                                     13                                                                                                    16                                                                                                                                                                                                                                                                 19                      22                                                                25
0.04                                                                                                                                     14                                                                                                    18                                                                                                                                                                                                                                                                 22                      26                                                                30
0.05                                                                                                                                     15                                                                                                    20                                                                                                                                                                                                                                                                 25                      30                                                                35
0.06                                                                                                                                     16                                                                                                    22                                                                                                                                                                                                                                                                 28                      34                                                                40
0.07                                                                                                                                     17                                                                                                    24                                                                                                                                                                                                                                                                 31                      38                                                                45
0.08                                                                                                                                     18                                                                                                    26                                                                                                                                                                                                                                                                 34                      42                                                                50
0.09                                                                                                                                     19                                                                                                    28                                                                                                                                                                                                                                                                 37                      46                                                                55
0.10                                                                                                                                     20                                                                                                    30                                                                                                                                                                                                                                                                 40                      50                                                                60
T5                                                                                                                                       Aircraft cruising, climbing or descending where opening speed exists using the Mach Number Technique    1. ATS surveillance system observation or passage over the same, on-track, positive radio fix confirms that the required time interval will exist at the common point.                                                                                           Time                    Mach No
9–5 min                                                                                                                                                                                                                                          2. The preceding aircraft is maintaining a greater Mach number than the following aircraft, in accordance with the adjacent table.
Mach No. Technique

9 min                                                                                                                                    Mach 0.02 faster
8 min                                                                                                                                    Mach 0.03 faster
7 min                                                                                                                                    Mach 0.04 faster
6 min                                                                                                                                    Mach 0.05 faster
5 min                                                                                                                                    Mach 0.06 faster
For T4 and T5, a common point is:
    (a) a geographical point on the track over which both aircraft will fly; or
    (b) a point along the individual track of each aircraft that is equidistant from the geographical point described in paragraph (a).
T6                                                                                                                                       Aircraft on reciprocal tracks                                                                           1. If lateral separation is not provided, vertical separation must be provided for at least 10 or 15 min, as applicable to the route (see T2 and T3 conditions), before and after the time the aircraft are estimated to pass, or are estimated to have passed.
10 or 15 min                                                                                                                                                                                                                                     2. In addition to the T2 conditions for application, the 10 minute time minimum may also be applied between aircraft equipped with approved LRNS.
Aircraft on Reciprocal Tracks
T7a                                                                                                                                                                                                                                            Both aircraft report passing the same positive radio fix.
Definite Passing (radio fix)
T7b                                                                                                                                                                                                                                              1. Both aircraft report passing the same visual fix, by day, or by night if both aircraft are NIGHT VFR.
Definite Passing (visual fix)                                                                                                                                                                                                                    2. The visual fix must be a prominent topographical feature within 10 000 ft of the levels of each aircraft.
T7c                                                                                                                                                                                                                                              1. Both aircraft report sighting and passing the other