The deck wouldn't be damaged, those guns don't look near big enough to do that, plus they won't fire all of them at the same time if it were in real life. Also, they obviously wouldn't have planes just sitting out on the deck when they went to go fire, and I don't think the shockwave from such small guns can damage planes, maybe make people go deaf or knock them off the deck if they were a lot larger guns. Also, there are only 8 triple barrel guns, from the look of them i'd guess IJN 6-8" guns. And this ship wouldn't be out alone, that would be stupid and just begging opposing fleets to sink it, it would have a very heavily armed and massive fleet of cruisers and things like that with AA, not to mention this ship would also have large amounts of AA. But yes, this would require way too much power and the shear size of this (like a CL and 2 aircraft carriers combined, that is a lot of sailors/weapons/ammo/planes/fuel/equipment. It would be more than a miracle if this thing actually was able to float.) is just not practical given that it has such small guns on it and two flight decks (why would any ship need TWO flight decks?).

Bit big and impractical I think. Would be an easy target and surely cant fire guns while launching aircraft. Or store enough aircraft to justify 2 decks. Or move very fast, or be very stable when firing all guns.

 

Looks cool though :)

Would this be a German equivalent? =P

for a real life situation it might be an alright ship as it has mobile artillery and has air support

but the cost of production / probably quite easy to sink with counter artillery etc would probably be too much of a risk to use/develop  

Is that a UFO?