At Yamato class, secondary guns are 155mm triple on center line.
ashe says guns are 127mm AAA.
My Kongo/Nagato BBs 127mm AAA is not my model.
I borrow 127mm model from Daidalos's Shokaku CV's .msh.
25mm machine gun model , triple ones are the same from Shokaku CV, twin ones are from Akizuki DD.
But Yamato's 127mm AAA and 25mm triple m-guns are special (not all, a half of all).
To avoid main cannons blast, half of AAA and 25mm are covered by shelter.
At 1941 built time, all the AAA and 25mm are covered by shelter.
But in adding AAA,25mm , added ones didn't have shelter.
At 1944 or 1945, lower side AAA,25mm had shelter, higher center AAA,25mm didn't have.
Differrence is only looking shelter were or not, but inside guns were the same.
http://ja.wikipedia.org/wiki/%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB:Yamato_model_AA_guns.jpgBTW, Shokaku class CV's right/rear side AAA/25mm had shelters in real, too. Daidalos don't modelize it.
This is not avoiding blast. For avoiding engine smoke. Shokaku's stack is right side and smoke flowed there AAA/25mm.