Should also put guns below, anti-aircraft guns at the least - aerial combat is done in 3 dimensions, so chances are high that some pilot is going to attack from below and shoot the ship at the bottom.



(And no, fighter escorts are not infallible. One or more WILL get through. Much worse if it's not a fighter but ANOTHER enemy aerodreadnought flying lower down in attitude and have its guns pointed up. So some form of hull bottom turret or AA emplacement will be necessary. )