Flight through active Class F airspace with the designator CYR
Why this is the answer
A CYR designator marks Class F restricted airspace. Under CAR 601.04, flight through active restricted airspace is permitted only with permission from the user agency that controls it (TC AIM-RAC, Class F). It is not limited to military or IFR traffic, and radio/transponder fit alone doesn't grant entry.
Reference
CARs 601.04 – IFR or VFR Flight in Class F Airspace TC AIM-RAC – Class F Airspace
Question reproduced verbatim from Transport Canada’s PSTAR Study and Reference Guide (TP 11919E). The answer key is Transport Canada’s; the explanation is ours.
A study aid — not a substitute for the official guide, the CARs, or your instructor.