What must be told to the aircraft if a SID does not contain crossing restrictions or is a SID w/ radar vectors?

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Multiple Choice

What must be told to the aircraft if a SID does not contain crossing restrictions or is a SID w/ radar vectors?

Explanation:
When a SID has no crossing restrictions or is being flown with radar vectors, there’s no published altitude constraint at fixes to obey. In that situation the aircraft should simply hold its current altitude until ATC issues a new clearance. Saying “maintain [altitude]” communicates this clearly and keeps the vertical profile unchanged while the controller provides routing or further instructions. The other options would imply changing altitude or give a heading instruction, which doesn’t address the necessary vertical state under these SID conditions.

When a SID has no crossing restrictions or is being flown with radar vectors, there’s no published altitude constraint at fixes to obey. In that situation the aircraft should simply hold its current altitude until ATC issues a new clearance. Saying “maintain [altitude]” communicates this clearly and keeps the vertical profile unchanged while the controller provides routing or further instructions.

The other options would imply changing altitude or give a heading instruction, which doesn’t address the necessary vertical state under these SID conditions.

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