Document ID: chunk:federal_register_of_legislation:F2023C00696:body:0:p46
Version: federal_register_of_legislation:F2023C00696
Segment Type: other
Provision Reference: 
Character Range: 148307–169224

an ADS-C report symbol from a FANS-1/A aircraft with a voice report from another aircraft, the measurement from or to the ADS-C symbol must be taken with reference to the beacon or waypoint reported by the other aircraft.

10.6.11         Distance Separation Minima

Minima                                                                                                                                                                                                                                                                                                                                                  Application                                                                                                        Conditions                                                                                                                                                                                                                                                                                                    Diagram
D1                                                                                                                                                                                                                                                                                                                                                      Climbing (for aircraft on climb to cruise)                                                                           1. Separation must be checked at sufficient intervals to ensure minimum separation is maintained.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                             2. Where B is climbing to a lower cruising level or both aircraft are climbing to levels which are not vertically separated, both A and B must report reaching their cruising levels.
20 NM                                                                                                                                                                                                                                                                                                                                                                                                                                                                        3. If aircraft B reports at cruising level first, immediate action must be taken to apply an alternative standard.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                             4. Distance information must be derived from:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (a) DME; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (b) in CTA only:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (i) GPSRNAV; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (ii) GPSOCEANIC.
D2                                                                                                                                                                                                                                                                                                                                                      Cruising (at levels not vertically separated)                                                                        1. Separation must be checked at sufficient intervals to ensure that minimum separation is maintained.
20 NM                                                                                                                                                                                                                                                                                                                                                                                                                                                                        2. Distance information must be derived from:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (a) DME; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (b) in CTA only:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (i) GPSRNAV; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (ii) GPSOCEANIC.
D3                                                                                                                                                                                                                                                                                                                                                      Arriving aircraft                                                                                                    1. Separation must be checked at sufficient intervals to ensure minimum separation is maintained.
20 NM                                                                                                                                                                                                                                                                                                                                                                                                                                                                        2. Distance information must be derived from:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (a) DME; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (b) in CTA only:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (i) GPSRNAV; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (ii) GPSOCEANIC.
D4A                                                                                                                                                                                                                                                                                                                                                     Change of level                                                                                                      1. One aircraft must maintain level flight while vertical separation does not exist.
15 NM                                                                                                                                                                                                                                                                                                                                                                                                                                                                        2. Distance information must be derived from:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (a) DME; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (b) in CTA only:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (i) GPSRNAV; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (ii) GPSOCEANIC.
                                                                                                                                                                                                                                                                                                                                                                                                                                                                             3. When using DME-derived information for level changes above FL 290, both aircraft must be on the same side of the DME beacon.
D4b                                                                                                                                                                                                                                                                                                                                                     Change of level                                                                                                      1. Non-DME B1 or B2 descending/climbing while A or C maintain level.
15 NM                                                                                                                                                                                                                                                                                                                                                   (1 aircraft equipped with DME and non-DME aircraft climbing/ descending)                                             2. Distance information must be derived from:
                                                                                                                                                                                                                                                                                                                                                        Also applicable if B is on the safe side of the aid at the commencement of level change                                 (a) DME; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (b) in CTA only:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (i) GPSRNAV; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (ii) GPSOCEANIC.
D4c                                                                                                                                                                                                                                                                                                                                                     Change of level                                                                                                      1. A1, A2 or C1, C2 climbing or descending while non-DME B maintains level.
15 NM                                                                                                                                                                                                                                                                                                                                                   (non-DME aircraft maintains level while DME equipped aircraft climbing/ descending)                                  2. Distance information must be derived from:
                                                                                                                                                                                                                                                                                                                                                        Also applicable if B is on the safe side of the aid at the commence-ment of level change                                (a) DME; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                (b) in CTA only:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  (i) GPSRNAV; or
                                                                                                                                                                                                                                                                                                                                                                                                                                                                             (ii) GPSOCEANIC.
    Note 1   In 4a, 4b and 4c, if the distance obtained is close to the minimum, then consideration must be given to a descending aircraft being faster than the cruising aircraft, or a climbing aircraft being