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Air Traffic Control (7110.65) | ATC | Effective: | 07-15-99 | Updated: | 04-02-99 |
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Provide longitudinal separation between aircraft as follows:
a. Supersonic flight:
1. Provided the Mach number technique is applied in accordance with para 8-3-3, MACH NUMBER TECHNIQUE;
(a) 10 minutes, or,
(b) 10 minutes, when one or both aircraft has been cleared to commence the deceleration/descent phase of supersonic flight and the preceding aircraft is maintaining a Mach number which is the same or greater than that of the following aircraft.
2. 15 minutes, between all other aircraft.
b. Operations in the West Atlantic Route System (WATRS) (subsonic flight):
1. Between all aircraft within the San Juan CTA/FIR 15 minutes, or
2. Aircraft operating at or above FL 280 within the WATRS area or west of 60° West when in transit to or from WATRS;
(a) 10 minutes, provided the Mach number technique is applied in accordance with para 8-3-3, MACH NUMBER TECHNIQUE; and
(1) Where tracks diverge from the common point:
(2) At least 10 minutes, longitudinal separation exists at the point where the tracks diverge; and
(3) At least 5 minutes, longitudinal separation will exist where the minimum lateral separation is achieved; and
(4) At least the minimum lateral separation will be achieved at or before the next significant point; or, if not, within 90 minutes of the time the second aircraft passes the common point or is within 600 NM of the common point, whichever is estimated to occur first;
NOTE-
The WATRS area is defined as beginning at a point 27°00'N / 77°00'W direct to 20°00'N / 67°00'W direct to 18°00'N / 62°00'W direct to 18°00'N / 60°00'W direct to 38°30'N / 60°00'W direct to 38°30'N / 69°15'W, thence counterclockwise along the New York Oceanic CTA/FIR boundary to the Miami Oceanic CTA/FIR boundary, thence southbound along the Miami Oceanic CTA/FIR boundary to the point of beginning.
(b) If the aircraft have not reported over a common point, it is possible to ensure, by radar or other approved means, that the appropriate time interval will exist at the common point from which they either follow the same track or continuously diverging tracks
3. Between 9 and 5 minutes, provided the Mach number technique is applied in accordance with para 8-3-3, MACH NUMBER TECHNIQUE; and
(1) It is possible to ensure by radar or other approved means, that the required time interval exists and will exist at the common point from which they either follow the same track or continuously diverging tracks and
(2) The preceding aircraft is maintaining a greater Mach number than the following aircraft in accordance with the following:
[a] 9 minutes, if the preceding aircraft is Mach 0.02 faster than the following aircraft;
[b] 8 minutes, if the preceding aircraft is Mach 0.03 faster than the following aircraft;
[c] 7 minutes, if the preceding aircraft is Mach 0.04 faster than the following aircraft;
[d] 6 minutes, if the preceding aircraft is Mach 0.05 faster than the following aircraft;
[e] 5 minutes, if the preceding aircraft is Mach 0.06 faster than the following aircraft.
NOTE-
When the preceding aircraft is maintaining a greater Mach number than the following aircraft, in accordance with the table above, and the aircraft will follow continuously diverging tracks so that the minimum lateral separation will be achieved by the next significant point, the requirement stated above, to have at least 5 minutes longitudinal separation where the minimum lateral separation is achieved, may be disregarded.
c. Between turbojet aircraft meeting the MNPS and operating in the New York oceanic CTA/FIR wholly or partly in MNPS airspace (subsonic flight):
1. 10 minutes, provided the Mach number technique is applied in accordance with para 8-3-3, MACH NUMBER TECHNIQUE; and
(a) Where tracks diverge from the common point:
(1) At least 10 minutes, longitudinal separation exists at the point where the tracks diverge; and
(2) At least 5 minutes, longitudinal separation will exists where 60 NM lateral separation is achieved; and
NOTE-
When the preceding aircraft is maintaining a greater Mach number than the following aircraft in accordance with this subparagraph, and the aircraft will follow continuously diverging tracks so that 60 NM lateral separation will be achieved by the next significant point, the requirement to have at least 5 minutes longitudinal separation where 60 NM lateral separation is achieved, may be disregarded.
(3) At least 60 NM lateral separation will be achieved at or before the next significant point (normally within ten degrees of longitude along track(s)) or, if not, within 90 minutes of the time the second aircraft passes the common point or is within 600 NM of the common point, whichever is estimated to occur first.
2. Between 9 and 5 minutes, provided the Mach number technique is applied in accordance with para 8-3-3, MACH NUMBER TECHNIQUE; and
(a) It is possible to ensure, by radar or other approved means, that the required time interval exists and will exist at the common point from which they either follow the same track or continuously diverging tracks; and
(b) The preceding aircraft is maintaining a greater Mach number than the following aircraft in accordance with the following:
(1) 9 minutes, if the preceding aircraft is Mach 0.02 faster than the following aircraft;
(2) 8 minutes, if the preceding aircraft is Mach 0.03 faster than the following aircraft;
(3) 7 minutes, if the preceding aircraft is Mach 0.04 faster than the following aircraft;
(4) 6 minutes, if the preceding aircraft is Mach 0.05 faster than the following aircraft;
(5) 5 minutes, if the preceding aircraft is Mach 0.06 faster than the following aircraft.
3. 15 minutes, between turbojet aircraft not covered in subparas c.1. and 2.
d. Operations between aircraft not covered in subparas b. or c. (subsonic flight):
1. Operations at or above FL 200.
(a) 15 minutes, between turbojet aircraft, provided the Mach number technique is applied, in accordance with para 8-3-3, MACH NUMBER TECHNIQUE.
(b) Between turbojet aircraft, provided the Mach number technique is applied in accordance with para 8-3-3, MACH NUMBER TECHNIQUE, and only when it is possible to ensure by radar or other approved means that the required time interval exists and will exist at the common point:
(1) 10 minutes when the preceding aircraft is at least Mach 0.03 greater than the following aircraft; and
(2) 5 minutes when the preceding aircraft is at least Mach 0.06 greater than the following aircraft;
2. 20 Minutes:
(a) Between aircraft operating below FL 200 west of 55° West;
(b) Between aircraft operating at all levels east of 55° West;
(c) Within the New York CTA/FIR;
(1) Between turbojet aircraft not covered by subparas d.1.(a) and (b) above;
(2) Between other than turbojet aircraft operating along routes extending between the United States, Canada, or Bermuda and the Caribbean ICAO Region.
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