Cub Driver wrote:

The argument goes that it makes it easy for them to check the ID of the plane without
having to enter the plane and it's more difficult to falsify than the painted
N-numbers.


Oh! You mean the *data plate*?

But haven't they been on airplanes all along?

Most, not all planes. Now they all have to be in the same spot. Pilots
side on the fuselage just in fron of the tail.