In article ,
whisky-dave wrote:
On Friday, 15 December 2017 16:46:55 UTC, harry wrote:
On Friday, 15 December 2017 12:07:37 UTC, whisky-dave wrote:
On Friday, 15 December 2017 11:48:59 UTC, Bob Eager wrote:
On Fri, 15 Dec 2017 02:24:24 -0800, whisky-dave wrote:

The economical cruise altitude rises as the plane gets lighter, so they
want to climb gently all the way across the ocean.

But they don't do that.
They don't take the shortest route from A-B they take a route where
they can be tracked.
Friend flew from gatwick to cacun on tuesday explan why they didn't just
fly directly across the ocean

You don't really understand map projections, do you?

So explain it if you understand it better.

https://en.wikipedia.org/wiki/Mercator_projection

So.
Why did the plane follow the eastern USA coastline then ?

Because that was tehn great circle route from London to Mexico

--
from KT24 in Surrey, England