I pressed MSG several times, and it kept appearing with other
notifications such as to remember to use OBS. I'm almost positive I
had it on Mode C, but I'll have to investigate these next
time...Thanks for the help.

On Apr 19, 1:32 pm, Mark Hansen wrote:
Once I've turned on the mode-c, I no longer get the message.

Is it possible the message was originally received while you were on
the ground (before you turned on the mode-c) and you never cleared
the message?

--
Mark Hansen, PP-ASEL, Instrument Airplane, USUA Ultralight Pilot
Cal Aggie Flying Farmers
Sacramento, CA