Loran?
I have a IFR certified GX60 (all the way thru approach) and an Apollo Flybuddy. The Flybuddy cannot be updated as Apollo no longer supports them (according to my avionics man - never called direct.) The little loran keeps on chugging. I've had the GPS back to the manufaturer 4 times and even at it's best it doesn't always work. The loran always works? The database is way out of date so I am very careful about using it but it's a great backup. Once it shoots craps, it's out of there! I've debated pulling it out every time I am in my avionics shop but it's too handy. I also carry a hnadheld gps for additional backup. Spending even $25 to buy a working STS is money peed in the wind, in my humble opinion.
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