Document ID: chunk:federal_register_of_legislation:F2023C00696:body:0:p53
Version: federal_register_of_legislation:F2023C00696
Segment Type: other
Provision Reference: 
Character Range: 205658–209193

provided to the IFR flight, unless it is impracticable.
V2                                                                 All aircraft                                                                                                            Up to and including FL 290.
1 000 ft
Aircraft with RVSM approval, excluding military formation flights  From FL 290 to FL 410 inclusive.
V3                                                                   1. Between aircraft, when at least 1 is not RVSM approved, or                                                         From FL 290 to FL 410 inclusive.
2 000 ft                                                             2. following pilot report of an inability to comply with RVSM, or
                                                                     3. military formation flights regardless of the individual RVSM approval state of each aircraft within the formation
All aircraft                                                       Above FL 410.
In known standing wave conditions or severe turbulence             All levels.
V4                                                                 When 1 or more aircraft is operating at supersonic speeds                                                               All levels.
3 000 ft

Section 10.8:   Separation Standards—Lateral

10.8.1              Lateral Separation Buffer

10.8.1.1         The Lateral Separation buffer is 1 NM between the possible positions of two aircraft. (ICAO PANS-ATM, Chapter 5.)

10.8.2              Application of Lateral Separation

10.8.2.1         Lateral separation may be achieved by:

(a)         establishing an aircraft's position outside the BLSP; or

(b)         applying an appropriate ATS surveillance system minimum; or

(c)          applying a 1 NM buffer to the track or position of an aircraft which is determined relative to a prominent topographical feature, if:

(i)            the aircraft is tracking visually; and

(ii)          the aircraft is not more than 10 000 ft above the topographical feature; and

(iii)        it is daytime.

10.8.2.2         Entry and Exit Points must be established by:

(a)         application to a BLSP of slant range and DME equipment error corrections;

(b)         application of RNAV tolerances;

(c)          passage over a visual fix located on the opposite side of a BLSP from the area of conflict;

(d)         passage over a positive radio fix located on the opposite side of a BLSP from the area of conflict;

(e)         expiration of a time calculated using an estimate for a BLSP plus or minus:

(i)            5 minutes, if the estimate for the BLSP is within 30 min of an ATD, passage over a visual fix, positive radio fix, way point or ATS surveillance system position; or

(ii)          half of the longitudinal time separation minimum applicable to the aircraft.

10.8.2.3         Aircraft transiting into an airspace in which larger tolerances are applied than that being exited are taken to be separated if:

(a)         the smaller separation standard exists; and

(b)         the aircraft are established on flight paths that will diverge by at least 15° until the larger separation standard is established; and

(c)          the aircraft are RNAV approved to AUSEP, MNPS, GPSOCEANIC, RNP10 or RNP4.

10.8.2.4         A DME-based lateral separation entry/exit point must be calculated by:

(a)         determining the ground distance from the DME site to the BLSP; then

(b)         if the area of conflict (or part of it)