PSA Airlines Canadair Regional Jet Systems (PSA-CRJ) Practice Exam

When setting a Decision Height (DH) on the radio altimeter, a cyan line is displayed on the altimeter's visual representation. This cyan line serves as a clear visual marker to indicate the altitude at which the pilot must make critical decisions regarding landing or continuing with the approach.

The significance of this visual indication is that it helps pilots maintain situational awareness, ensuring they are alert to the altitude at which they must assess whether the approach can continue safely. The use of color coding, such as the cyan line, assists in differentiating the DH setting from other altimeter readouts or indicators, thereby reducing the risk of confusion in high-pressure situations.

The other options do not represent the standard visual indications related to DH settings in radio altimeters used in aviation, highlighting the specificity and importance of the cyan line as an established and recognized symbol within cockpit instrumentation.