Document ID: chunk:federal_register_of_legislation:F2023C00696:body:0:p44
Version: federal_register_of_legislation:F2023C00696
Segment Type: other
Provision Reference: 
Character Range: 142939–145873

a distance check must be made before the first aircraft leaves ATS surveillance system coverage.

10.6.7.10     Separation minima D4, D7 and R3 (change of level) may also be applied between 2 aircraft if:

(a)         the aircraft are confirmed to be on opposite sides of an en-route navigation aid, and 1 aircraft's distance is established by RNAV/DME to be not closer to that aid than the distance required by the separation minimum; or

(b)         the distance determined by an ATS surveillance system, or by the position of 1 identified aircraft and an RNAV/DME report from the other, establishes that the distance between the aircraft is at least the distance required by the procedural separation minimum plus the applicable ATS surveillance system separation minimum; or

(c)          1 aircraft's distance is established by RNAV/DME and the second aircraft's position is established, by day, with reference to a visual fix, if:

(i)            the fix is a prominent topographical feature within 10 000 ft of the aircraft; and

(ii)          the feature is displayed on maps available to ATC.

10.6.7.11     Except for standard R6, closing speed between aircraft may exist provided that:

(a)         separation is in excess of the minimum distance required;

(b)         distance checks are made at intervals not exceeding 15 MIN; and

(c)          when aircraft are cruising at levels not vertically separated, the closing speed is not greater than 35 KT IAS or M 0.06.

10.6.8              Use of DME/GPS Separation

10.6.8.1         In the description and application of these separation minima, 'DME' includes TACAN for distance measurement. TACAN distances may be used for the same purpose as DME provided that all tolerances and conditions shown for DME are applied.

10.6.8.2         In CTA only, GPS distance information may be provided by GPSRNAV or GPSOCEANIC aircraft for the application of minima D1-4, subject to the following conditions:

(a)         where a mix of GPS and DME distances is used, distance reports must not be used if one aircraft is within 20 NM of the reference point;

(b)         when GPS is used by both aircraft, the standard may also be applied with reference to published waypoints.

10.6.9              RNAV Separation

10.6.9.1         RNAV distance minima may be applied between aircraft with approved LRNS, or between an aircraft with approved LRNS equipment and an aircraft with DME.

10.6.9.2         RNAV minima must not be applied after pilot advice of:

(a)         operation of LRNS equipment outside prescribed criteria, including deterioration or failure; or

(b)         operation of an INS/IRS outside the time limits mentioned in the operational approval:

(i)            CTA — 5 hours multiple sensor or 3 hours single sensor; or

(ii)          OCA — 12 hours multiple sensor, 5 hours single sensor or 4.5 hours MNPS; or

(c)          RAIM loss or loss of integrity, for