How long before /G required for IFR?

Dan Thompson wrote:
This is an old horse and I almost hate to bring it up again, but are you
aware you can legally accept direct FUBAR as a /U under IFR, and monitor
your progress with a handheld GPS?

You're not cleared direct. You're given a vector that is essentially
direct. /G allows you to accept a clearance "direct FUBAR."



Currently the only reason one ever needs an IFR GPS is to fly a GPS
approach.

A terminal/enroute only box allows you to eliminate your ADF and DME
which is very handy if you fly a lot of ILS and VOR approaches anyways.