Originally Posted by
Cubdriver
The nice thing about DME arcs is that they can be intercepted at any angle. This saves time and makes the approach more efficient because you have an almost unlimited number of initial approach fixes.
To qoute John Eckalbar, author of IFR A Structured Approach,
"...we are not to turn onto a DME arc at a randomly encountered location on the arc-arcs are to be entered only at the depicted IAF's on the arc." "...if we come up the (XXX radial) towards (XXX VOR), we can't take a quick left on the 10 DME arc and take advantage of its "NoPT" feature."
That was a question I had when I was training for my instrument, "can I just turn onto the arc and be good to go?" Unfortunately not. I'm trying to find AIM reference, but so far Eckalbar's words have been quickest to find.
I say this only to clarify how arcs are supposed to be entered.
Best to you, block30