Definition
Simultaneous independent instrument approaches conducted to two parallel runways, where each aircraft is sequenced and monitored separately and the two approach streams do not depend on one another for spacing.
Plain English
Two aircraft flying instrument approaches at the same time to two parallel runways at the same airport, each handled on its own without having to be staggered behind the other.
Context Anchor
Seen in discussions of precision runway monitor operations and airports using closely spaced parallel runways.
Derivation
Dual' comes from the Latin 'duo' meaning two. In this context it signals that two separate approach operations are happening side by side at the same time, not that one approach has two parts.
Why Pilots Care
Increases airport arrival capacity at busy facilities while preserving safety margins through real-time monitoring and breakout instructions.
Intuition Check
Do not read dual approaches as simply “two approaches in a flight.” Here it means two aircraft making approaches at the same time to separate runways.
Example Sentence 1
With PRM in use, the controller cleared us for one of the dual approaches while another jet flew the parallel approach to the next runway over.
Example Sentence 2
During dual approaches, the crew stayed alert for any breakout instructions from approach control.