Is the carrier available in offline play? How do you get on it?
Yes, select it as you would select any field.
What is the main arena in online play?
The MA as we call it is a giant WAR consisting of up to 200 players in various planes, vehicles, boats and whatnot bombing other teams refineries, capturing fields.
There are the Countries
The ROOKS
The Knights
The BISHOPS
YOU WILL LOVE THE MA.
What is a good altitude to use the B-17 at?
Well there is like totall NO bomb dynamic modelling in AH meaning that you can hit a fly with a single bomb from 40,000 feet, so basicall you can fly as high as you want and hit everything with pinpoint accuracy (which is a Joke IMO) however i fly ALL bombers between 20 and 25 thousand feet for long range rades and at around 15 thousand feet for short range raids.
Hope that helps.