Due to the massive blast from the 18 inch guns the ships boats were stored below deck and these were the pathways used to bring them out.
The blast of the main guns was so great they had to shield all the AA until late in the war when it was apparent they need more AA. In addition the already poor 25mm mounts were even less effective when shielded. Each armor piercing shell weighed 3300 lbs, the 16 inch counter the Iowa's fired weighed 2650 lbs.
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