Larry in TN

You do the same thing you do anytime ATC gives you a clearance that doesn't make sense. "Resume own nav" makes no sense in an IFR...

If you are IFR, they aren't going to give you a non-specific, "Resume own navigation " if you are off your filed course. They are going...

IFR aircraft don't need ATC to maintain separation from terrain.

IFR?

He's not going to say "resume own navigation". When you request the deviation, he'll say, "[left/right] deviations approved, direct...

Are you not flying N5150 anymore? I guess OU812 is newer?

We get "Cleared direct [waypoint]" all the time. Very common. It does not change our clearance limit. A change in clearance limit...

There is no ambiguity. The difference between "cleared to" and "direct to" is clear. The wording in the regulation, AIM, and P/CG is...

FWIW I spent a couple of years incrementally upgrading my panel before doing my IR training. From the very get go I settled on a...

More likely, a mistake. They think it's on your route but isn't. Happens to us occasionally. We tell them that it isn't on our route...

"Cleared direct [waypoint]" is the clearance. How can that phraseology mean direct from anywhere other than your present position?

The Waymo fleet is close to that but there are limitations. Chiefly, they are geofenced into a small area and sometimes get stuck...

14 CFR 91.181 - (b) On any other route, along the direct course between the navigational aids or fixes defining that route. ...

The hardware is used for Autopilot, which is included in every Tesla. Only the additional FSD features cost extra. But, Teslas are not...

There's no requirement to buy FSD. All cars come with Autopilot. FSD is an add-on option.