"Roy Smith" wrote in message
...

On the 480, I would hit the VTF soft key (assuming I've already got the
approach loaded with some arbitrary IAF selected). At that point, the box
would create a segment from [a point 50(*) miles 182 degrees from FRZZN]
to
FRZZN, make that the active leg (i.e. draw it in magenta on the map), and
go into suspend mode. Assuming I was given a good vector, flew it
correctly, and had sufficient fuel, I would eventually intercept that
segment. At that time the box would automagically come out of suspend
mode. When I reached FRZZN, it would sequence to FRZZN-MAP36 being the
active leg.

(*) I think it's 50 miles. Could be something else, but it's long enough
that it's never been an issue for me.

Roy, apparently VTF works much differently on the 480 than the 430 and
sounds correctly implemented. On the 430, VTF doesn't work properly on a
dogleg approach. It sets up for the dogleg intermediate segment rather than
the extended final course. Have you checked the 480 for a dogleg, such as

http://www.naco.faa.gov/d-tpp/0612/05924VDB.PDF
or
http://www.naco.faa.gov/d-tpp/0612/06712R23.PDF ?