Talk:Mackerel/@comment-26095489-20161022034159/@comment-30204887-20161022035618

On the same ship, two are redundant and useless. It doesn't stack.

On two different ships, it's redundant, but kind of (sort of, maybe) alright if you think the first searchlight ship gets reduced to exactly 1HP. Though that would be difficult for a BB. It's needlessly risky in Combined Fleet night battle since you (probably) want the enemy to keep hitting your unsinkable second flagship.