If I recall correctly from the investigation report at the time, the Canadian Airlines airplane that had the close call with Tabor Mountain was also equipped with those nav transfer switches. The crew that was flying it were unfamiliar with this feature as they had only flown 737s that were not so equipped prior to the CP - PWA merger. There was no documentation of the differences provided to the pilots until after that incident occurred. If the crew really were fired, then an injustice was done, IMHO.