Originally Posted by
Jagboi
Doesn't work for bulkhead or exit rows where there isn't a seat in front of you!
For ‘A’, one should really be measuring the pair of seats one is sat in rather than the pair in front, hence bulk head is not an issue, but the last row is.
This would also deal with seats that are misaligned with the ones in front (even if their frames connect to the same floor harness).