Document ID: chunk:federal_register_of_legislation:F2023C00696:body:0:p51
Version: federal_register_of_legislation:F2023C00696
Segment Type: other
Provision Reference: 
Character Range: 199578–202506

aircraft in CTR/CTA must not be permitted to transit vertically below the 15 NM radius of the balloons position while the balloon is ascending until the balloon has passed FL600.

10.7.3              Step Climbs and Descents

10.7.3.1         The Step Climb Procedure may be used to simultaneously climb aircraft to vertically separated levels provided that the lower aircraft is progressively assigned levels that provide vertical separation with the higher aircraft.

10.7.3.2         When applying the step climb or step descent procedures, pilots must be advised that they are subject to a step climb or descent.

10.7.4              Specifying Rates of Climb

10.7.4.1         Except for international aircraft, a rate of climb or descent must be described in each level clearance when a specified rate is required to ensure the vertical separation is maintained.

10.7.4.2         When it is necessary to specify a rate of climb or descent to an international aircraft, the rate must always be specified in feet per minute, not 'standard rate'.

10.7.4.3         ATC must endeavour to avoid prescribing rate of climb or descent if it is believed that an aircraft is:
(a)         operating in close vertical proximity to the control area lower limit; or
(b)         descending VISUAL or VFR to an assigned level and maintaining clearance from terrain or cloud.

10.7.4.4         A rate of descent must not be specified to any aircraft instructed to make a 'VISUAL APPROACH" or "DME ARRIVAL", or to an aircraft on that part of an instrument approach below the lowest holding altitude.

10.7.5              Rate in Step Climb/Descent

10.7.5.1         During a Step Climb or Step Descent where a rate of climb or descent has been specified, the rate must apply to all level clearances issued in the course of the climb or descent. The rate must be specified in the initial clearance using the phrase: "... STEP CLIMB (or STEP DESCENT) - STANDARD RATE (or at FEET PER MINUTE)".

10.7.6              Assigning Vacated Levels

10.7.6.1         A level vacated by one aircraft may be assigned immediately to a second aircraft provided that:
(a)         the required vertical separation has not been increased because of the possibility of turbulence;
(b)         the first aircraft has been assigned a level requiring a level change of at least the minimum being applied; and
(c)          both aircraft have been instructed to change level at a specified rate which will ensure that the applicable vertical separation standard is not infringed.

10.7.6.2         The lowest holding altitude may be assigned to a second aircraft when the first aircraft has reported, "ON FINAL - LEFT (final approach altitude)", provided that the following aircraft is instructed to descend at "STANDARD RATE" (or at 500 FT per minute).

10.7.7              Vertical Separation Using ADS-C

10.7.7.1         A tolerance of ± 200 ft must be applied