Definition
Gateway waypoints are unnamed, charted fixes on certain RNAV Standard Terminal Arrival Routes (STARs) and Standard Instrument Departures (SIDs) that mark the transition between the en route structure and the terminal procedure. They are coded in the navigation database and flown by the FMS but are not assigned by ATC and do not appear as named fixes on the chart.
Plain English
A gateway waypoint is a hidden hand-off point built into a published arrival or departure route. It tells the aircraft's navigation computer where the en route part of the flight ends and the arrival or departure procedure begins, even though the pilot never says its name on the radio.
Context Anchor
Seen in instrument route and procedure discussions, especially where a route enters or leaves a larger routing structure or terminal-area flow.
Derivation
Gateway is used in its everyday sense -- a passage from one place to another. These waypoints act as the gate between the en route structure and the terminal arrival or departure structure.
Why Pilots Care
They maintain a reliable link to the national airspace route structure and ensure the procedure remains flyable and compliant.
Grounding Statement
Picture a named point in the sky where your route passes from one part of the instrument system into another.
Intuition Check
Gateway does not mean an airport gate, a ramp gate, or a physical marker on the ground. Here it means a named navigation point used as an entry or exit point.
Example Sentence 1
As the flight transitioned from the en route phase to the arrival, the FMS sequenced through a gateway waypoint that linked the airway to the STAR.
Example Sentence 2
The designer placed a gateway waypoint to connect the en route airway directly to the terminal procedure.