jetcareers - View Single Post - Why is the Inner Marker Beacon sometimes labeled "A" ?

jwp_145 · January 5th, 2008, 00:06

I've noticed that in some aircraft, particularly older ones, the Inner Marker alerter is labeled with an "A". Outer marker is "O", Middle is "M", and sometimes the Inner is "I"(duh), but is often "A".

WHY?

January 5th, 2008, 00:06	#1
jwp_145 Junior Member Join Date: Oct 2007 Location: Tulsa, OK USA Posts: 225	Why is the Inner Marker Beacon sometimes labeled "A" ? I've noticed that in some aircraft, particularly older ones, the Inner Marker alerter is labeled with an "A". Outer marker is "O", Middle is "M", and sometimes the Inner is "I"(duh), but is often "A". WHY?