12A is the first row of Y (in a small separate cabin). Many (wrongly) think this is some sort of premium cabin...in my experience this section (row) is full of families with small children and pax needing assistance. About the only good thing about it is that you are the first Y pax to get off the plane. The rest of economy is worse.

The coffin seat is row 14 (at least on the 763s used for intl routes). Someone at AC decided not to splurge for another window, so you experience complete sensory deprivation....then the food comes!

Have a good flight