Originally Posted by
usbusinesstraveller
They (D/F) have been like that on the 2 class Polaris 763's since 2017. Don't know why but it's consistent with what they already have.
If you look at an image of that cabin -- I haven't flown the reconfigured 763 yet -- you can see what I'm talking about. The entrances for the center column seats alternate from one side to the other. So, walking down one aisle, you can sit in 1D, 3D, 5D, etc.; in the other aisle, you can sit in 2F, 4F, 6F. Using different letters makes it easier to figure out which aisle you should use.