When issuing an approach clearance on unpublished routes, which condition must exist prior to clearance?

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Multiple Choice

When issuing an approach clearance on unpublished routes, which condition must exist prior to clearance?

The essential point is that when you issue an approach clearance on an unpublished route, there must be a defined, navigable path the aircraft can join: the aircraft must be established on a segment of a published route or on a published instrument approach. This gives ATC a known, safe path for the aircraft to follow to the approach, which helps ensure proper navigation, sequencing, and obstacle clearance even though the route itself isn’t published as a whole. This is why establishing on a published route segment or an instrument approach is the necessary condition before clearing an aircraft to an unpublished route. The other options aren’t the controlling factor: being IFR, or the tower being operational, or the flight plan simply verified are not the specific gating condition for issuing that type of clearance.

The essential point is that when you issue an approach clearance on an unpublished route, there must be a defined, navigable path the aircraft can join: the aircraft must be established on a segment of a published route or on a published instrument approach. This gives ATC a known, safe path for the aircraft to follow to the approach, which helps ensure proper navigation, sequencing, and obstacle clearance even though the route itself isn’t published as a whole.

This is why establishing on a published route segment or an instrument approach is the necessary condition before clearing an aircraft to an unpublished route. The other options aren’t the controlling factor: being IFR, or the tower being operational, or the flight plan simply verified are not the specific gating condition for issuing that type of clearance.

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