I didn't say anything about direction. Early airplanes (even in the first airlines) did not have speedometers. They had to approximate their speed.
First of all, aircraft do not have 'speedometers'. They have airspeed indicators and sometimes ground speed indicators. Secondly, the pitot tube (the basis of most airspeed indicators) was invented in the late 18th century and many (if not most) WW1 aircraft (long before any airliner) had airspeed indicators. Now, unless you actually mean ground speed indicator, then you might have a point, but not a very good one. The difference in RET and FET distances (especially south of the equator) are just too great to be waved away.
lol "speedometers." That sounded kinda wrong when I read it. Thanks for saving me the time of looking that up.
It also seems kind of cock-eyed to compare a couple of voyages on a boat to prove every single modern flight wrong.
I don't really believe the math AND navigation equipment AND the government are all lying to us, and this fringe group of non-scientists with an extremely flimsy, faulty, unproven and highly unlikely theory are the only ones who know the truth. Hey, I'm not a scientist. I'm surprised my pre-graduate physics classes are actually helping me maintain a sophisticated argument, but... I'm sorry. The flat Earth argument is simply that... FLAT! There are retired Navy pilots and astronauts who are supposedly leaking government information about UFO's and aliens. Not ONE of them is telling us anything about a flat earth conspiracy.