Don't worry about the Fed on the jumpseat. If Approach cleared you to intercept and assuming cleared you for the approach, arm the APP mode and enjoy the ride.

Ferrying a 767 into ORD once from SEA, we were 20 miles outside of SEXXY for 14R and the approach controller told us "to turn right to a heading of 120, maintain 4,000' until SEXXY, cleared for the visual to 14R, cleared to land and cleared to the ramp. Goodnight". It was 3:00 AM and that was the last transmission we heard until the engines were shut down. As for the autoflight, we left it on just for the heck of it and it did a beautiful job once the APP mode was armed.

Not a big deal and the Marine answered your technical questions.

G'Night Mates