airport operationsFAA-published sample question (IRA, Aug 2021)
Which type of runway lighting consists of a pair of synchronized flashing lights, one on each side of the runway threshold?
A
MALSR.
B
HIRL.
C
REIL.✓ Correct Answer
Explanation
AIM 2-1-3 describes REIL as a pair of synchronized flashing lights located laterally on each side of the runway threshold, giving rapid identification of the approach end of the runway. MALSR is an approach light system with sequenced flashers extending into the approach area, and HIRL are the steady high-intensity lights along the runway edges.
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