Document ID: chunk:federal_register_of_legislation:F2023C00696:body:0:p28
Version: federal_register_of_legislation:F2023C00696
Segment Type: other
Provision Reference: 
Character Range: 79134–82233

if possible, override the label displayed level information with the reported level and tell the next control position or ATC unit for the aircraft of the action taken.

10.2.4              Determination of level occupancy using ATS surveillance system-derived level information

10.2.4.1         Aircraft maintaining a level. An aircraft is taken to be maintaining its assigned level as long as the pressure altitude-derived level information indicates that it is within ±200 ft of the assigned level.

10.2.4.2         Aircraft vacating a level. An aircraft cleared to leave a level is taken to have commenced its manoeuvre and vacated the previously occupied level when the pressure altitude-derived level information indicates a change of 400 ft or more in the anticipated direction from its previously assigned level.

10.2.4.3         Aircraft passing a level in climb or descent. An aircraft in climb or descent is taken to have passed a level when the pressure altitude-derived level information indicates that it has passed this level in the required direction by 400 ft or more.

10.2.4.4         Aircraft reaching a level. An aircraft is taken to have reached the level to which it has been cleared when the greater of 3 consecutive renewals of display updates or at least 15 seconds have passed since the pressure altitude-derived level information indicated that it was within ±200 ft of the assigned level.

10.2.5              Establishment of identification

10.2.5.1         Aircraft must be identified by at least 1 of the following procedures:

(a)         application of 1 or more of the identification procedures specified in PANS ATM;

(b)         correlating a particular position symbol to the position of an aircraft observed visually.

10.2.6              Position information

10.2.6.1         ATC must tell the pilot of an aircraft provided with ATS surveillance service of its position in the following circumstances:

(a)         on identification, unless the identification is established:

(i)            based on the pilot's report of the aircraft position, or within 1 NM of the runway on departure, if the observed position on the situation display is consistent with the aircraft's time of departure; or

(ii)          by use of ADS-B aircraft identification, SSR Mode S aircraft identification or assigned discrete SSR codes if the location of the observed position indication is consistent with the current flight plan of the aircraft; or

(iii)        by transfer of identification (see subsection 12.1.7);

(b)         when the pilot requests this information;

(c)          when the pilot's estimate differs significantly from the controller's estimate based on the observed position;

(d)         when the pilot is instructed to resume own navigation after vectoring if the current instructions had diverted the aircraft from a previously assigned route;

(e)         immediately before termination of ATS surveillance service, if the aircraft is observed to deviate from its intended route.

10.2.7              Use of Speed Control

10.2.7.1         Speed