10.9 Shuttle Procedure
A shuttle procedure is defined as a manoeuvre involving a descent or climb in a pattern resembling a holding pattern. Shuttles are generally prescribed on instrument procedure charts located in mountainous areas. In the approach phase, it is normally prescribed where a descent of more than 2 000 ft is required during the initial or intermediate approach segments. It can also be required when flying a missed approach or departure procedure from certain airports. A shuttle procedure shall be executed in the pattern as published unless instructions contained in an ATC clearance direct otherwise.
The standard holding airspeeds may not be adequate for climbing, primarily because operational climb airspeeds usually exceed level holding speeds. If no airspeed limit is published on a climb shuttle (e.g. departure or missed approach), then in accordance with CAR 602.32, normal climb airspeeds applicable to aircraft type and airspace classification could be flown (see RAC 10.7(d)). Likewise, if no airspeed limit is published on a descent shuttle (e.g. arrival or approach), then maximum airspeeds appropriate to aircraft type and airspace classification, subject to CAR 602.32, must be observed.
To ensure that the aircraft does not exceed the obstacle clearance protected airspace during a shuttle descent or climb, the aircraft must not exceed:
a) the airspeed limit, as published on instrument procedure charts; and/or
b) the normal climb or descent airspeed for aircraft type and airspace classification, subject to CAR 602.32 (if no airspeed limit is published); and/or
c) the outbound/inbound still air time restrictions (see RAC 10.6); and/or
d) the DME holding restrictions (see RAC 10.8).
NOTE: 250 kt IAS must be observed below 10 000 ft ASL and 200 kt IAS below 3 000 ft AGL within 10 NM of a controlled aerodrome even if in climb (see CAR 602.32).