Conditional Route
Conditional Route
CDR
Definition
Conditional Route is defined as non-permanent ATS route or portion thereof which can be planned and used under specified conditions.
Description
According to their foreseen availability and flight planning possibilities, CDRs can be divided into the following categories:
- Category One: Permanently Plannable CDR,
- Category Two: Non-Permanently Plannable CDR,
- Category Three: Not Plannable CDR.
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SKYbrary Aviation Safety. (June 24, 2022). Conditional Route.
Retrieved February 2, 2026
from https://skybrary.aero/articles/conditional-route
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