"C J Campbell" wrote in message ...
I guessed what happened the moment I read that you had flown through the
localizer. This is becoming a real problem and I am beginning to think that
there is a fundamental design flaw in advanced avionics systems.

I have noticed a tendency for people to forget to switch on the CDI even
when they are very familiar with the GPS.

This is one reason we like our setup, which is a separate CDI dedicated
to the GPS. It's always GPS, the CDIs are always LOC/VOR.

One question for the original poster: is the GPS moving map in your scan?
Does it automatically, or is it configurable, to show the loc course?
I do this, and find it helpful.

If the CDI must be manually switched, it definately needs to be built
into one's approach checklist and as the original poster pointed out,
that's the reason it's needful to become familiar with each installed
avionics setup. If I moved into a plane (or a setup) that required
manual switching I'm sure it would bite me before I'd had time to
integrate the check into my procedures.

Cheers,
Sydney