Recently when I’ve been taking off in the Cessna 152 there is a yellow button at the top of the dash marked M that beeps for a few seconds, then goes out. A couple of times it’s done it as I come in for landings as well. Does anybody know the button I mean, and what it is warning against?

Hi Kjave767, This is likely the middle marker which your are refering too. It will start beeping it you are approx. 1 km from the runway. This website contains a pretty detailed description: https://landingsystem.com/ils/marker-beacons/ Johan

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Yellow button in Cessna 152

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PZL104 May 2, 2021, 8:15am 5

I didn’t realize that I’m THAT old, sigh…