midlifeflyer thanks for the link to the NACO site. I recently changed 135 companies and the new one uses NOS charts so I had to learn the new format and I'm still learning. I agree that NOS enroute is better. The NOS arrangement is still not intuative to me, different sections for IFR departures (nonstandard), it includes high approaches used by the military, etc. Other than those nuances it hasn't been too traumatic of a transition. I agree with learning both, and studying Jepp stuff if you have an interview.