The KLN was cutting edge back when it was new. Believe it or not, there were people flying aircraft before 2005.
Yeah, I know. I used the KLN 89/B (new around 2001) before I even touched Garmin and it was a much better GPS than the KLN900 (new around 1998). It was much more user friendly. Now LORAN, never had the pleasure of using that one....Ever use OMEGA?