Definition
High-altitude airways depicted on IFR en route high altitude charts that serve as both a conventional Jet route (defined by VOR navigation aids) and an RNAV (area navigation) route (defined by waypoints). A single charted route carries two designations and can be flown using either ground-based VOR navigation or RNAV equipment.
Plain English
A single high-altitude route that has two names on the chart — one for pilots flying it with VORs, and one for pilots flying it with RNAV. Either way, you're flying the same path.
Context Anchor
Seen on IFR En Route High Altitude Charts where route labels show both a Jet route designation and an RNAV route designation along the same segment.
Derivation
"Joint" simply means shared — the route is shared between two navigation systems. "Jet route" is the long-standing name for high-altitude VOR airways. "RNAV" stands for area navigation, meaning navigation by waypoints rather than station-to-station.
Why Pilots Care
Enables efficient high-altitude routing without requiring separate airway structures for different navigation equipment.
Intuition Check
Do not read “joint” as a special procedure or an extra clearance requirement. It simply means the Jet route and RNAV route share the same charted path for that segment. Do not read “Jet route” as meaning only jet airplanes may use it. It is the name of a high-altitude IFR route system.
Example Sentence 1
The crew identified the segment as a joint Jet/RNAV route, so either the J-route or the Q-route designator could appear in their clearance.
Example Sentence 2
Pilots planning a high-altitude trip checked the chart and confirmed that the selected joint Jet/RNAV route was available for their non-RNAV jet.