Kln 89b & Kln 90b

[lawn_dart]

Hi just wondering if there is a significant differnce in operation between the KLN 89B GNSS and the KLN 90B unit.

I've got some experience on the 89B unit but will have to operate the same aircraft type using the 90B.

Cheers

[411A]

I have used both, and have an 89B installed in my private airplane.
Both are godd units, however, there are significant differences in their operation.
I prefer the 89B, and...if you can afford one, the KLN94 is a slide in replacement that has simplified/streamlined ops.
However, neither is approved for WAAS.