Transponder Mandatory Zones (TMZ), defined areas in which the carriage of an operational transponder is required, have been implemented in several states to improve safety.
IFATCA Policy is:
All aircraft operating as IFR flights shall be equipped with a pressure-altitude reporting transponder.
|See: Resolution B5 – WP 90 – Kathmandu 2012|
Last Update: October 2, 2020