A VOR fix jutted in a map on your lap, a line taken with a ruler to the next point. At track line obtained between said points...
So what is your accuracy in setting such a point? Are you sure you get radial 034 from the VOR or 037, the rose around the VOR on an enroute chart is pretty small. Are you going to actually draw on the map at all? Next from the inaccurate found point, perhaps just identified by holding a finger on the map, you are now going to draw(?) a line to the cleared point. How precise are you going to obtain that track in degrees (measured from the angle from the nearest median)?
(Don't say that you will obtain it from the flight plan, since of course you are aware that at most handoffs to a new sector you get a direct to the next sector boundary.)
So now you arrive near the next point, and of course one of the criteria are met first, because no way you will be bang on with the above approximation. When will you initiate the turn to the new track? How will you correct that track to get you back on precise route again.
Next you'll see that over the next points there will be an airway change. There is only 15nm between the next to points, unfortunately the controller doesn't provide you a direct too 200nm away. You are still to pround to ask ATC for radar vector and while you are looking the the map to find a new suitable VOR to tune, identify, jut a new unprecise point in your map, find a new unprecise track in the map (because you didn't turn over the required RNAV point you still can't use the flightplan)....
all while moving at 8 nm pr. min.
While sitting heads down, ATC advice you to immediately turn right due to converging traffic in your 11 o'clock position. They then require to know why you strayed off your assigned route and inform you that they have to write a report.
Which part of unprecise don't
you understand?
All may work well over Northern Australia, but over Europe?
What part of "The phrase "Negative RNAV" is appended to each radio message on initial contact with each ATC frequency change." do you or ATC not understand?
Exactly! Only makes all your assumptions more hypothetical. When you say negative RNAV, ATC will send you off on a vector straight away - because they want to drink their coffee peacefully without "Omegaman" straying of his route and messing up their planned strategy.
Are you going to decline the vector and say.. negative RNAV but we are able direct RNAV point XYZ anyway??
Even more so when the vector given significantly shortens your route?
