Firing arc clarification

So going through the rulebook for 1.5, the various firing arcs are labeled as front (f), broadside (bs), rear (r), or unlimited (-). However, on the status cards, while the front, broadside, and unlimited arcs are correct, the rear armament is labeled 'A'. I'm assuming this means 'Aft', but I thought I'd get the official word just to be sure.

Yes, in earlier versions I used the 'rear' term, but later I switched it to 'aft' as it is a more proper naval term. It seems I missed some instances in the rulebook. Thank you, I add the changes once I update the rulebook.