You've planned your takeoff roll in the first Question, loaded the aircraft properly in Question #2, and now it's time to check destination NOTAMs, such as this one:

Ailerona IA (Ailerona Muni) [IA66]: August NOTAM #9
Runway 18 RAI light OUT of SERVICE August 18th, 2014 at 08:19 AM CDT

Runway 18 seems to have its RAI light on the fritz. What does RAI mean?


Runway approach instrument


Runway alignment instrument


Random answer indicated


Runway alignment indicator

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