How Do They Fly????

[KenG]

Covoxer:

So from all the range of commercial uses of the aircraft that you explained, only one is an answer
The "airliners" word should be a hint

Ok lets discuss the word airlines and see what that would entail. For the FAA we can check to see if the word is in FAR part 1. Checking Part 1 I do
not see airline or airlines defined by the FAA. There is air carrier, however you seem to be 100% focused on airlines so I will ignore air carrier.

So if the FAA does not define it then we can goto Webster: airline: an air transportation system including its equipment, routes, operating personnel,
and management.

By the above definition such organizations as NETJETS, Air ambulances, and even sight seeing tours do have "equipment, routes, operating personnel,
and management" thus qualifying as airlines.

While we are focusing on words lets take a look at one of your statements:

Covoxer:

All commercial airlines make their flights under IFR. This is a RULE.

I would really like to know what FAR you pulled this rule out of as I am hard to find a rule that states "all air carriers must operate IFR." There is
a small airline in Alaska that operates normally aspirated twins who operate under both IFR and VFR depending on the needs.

Covoxer:

If you use not pressurized aircraft, use victor airways (low level airways).

Again strictly speaking wrong. I can operate a T210 with bottled oxygen in the lower 20s. Thoes are Jet routes not victor.

Covoxer:

So, airlines always fly by airways.

Again not always the case. RNAV has allowed for more direct operations. While most airlines do not take-off and turn direct to their destination there
are parts of their route that is direct. I have been in my King Air many times and heard airlines (it is easy to identify their callsigns) cleared
"direct" i.e. not following an airway. While more frequent in the U.S. this is less frequent overseas. Flying direct portions of a route saves gas
which saves money. The air carriers are all over saving money.

Finally while the NATS are very well defined air structures you do not have to follow a NAT when flying overseas. There are random routes which allows
for an operator to operate outside of the NAT structure. Same with the Pacific tracks.

Now that we are done strictly speaking, or at least I hope we are. You will see that while I did divest I also tried to answer his question and maybe
open up other areas he did not think about. Sorry if I offended the forum police.