Talk:List of Secondary Guns by stats/@comment-58.173.232.194-20141019035823/@comment-25361436-20141019040712

Increased accuracy. This is useful for ships that cannot use artillery spotting anyway, and would not gain any major benefits from main guns.

The other use for secondaries is use in conjunction with a main gun in order to produce one of two artillery spotting effects. Highly useful for controlling the amount of damage other ships do when you are leveling, in my opinion.

And then there's other pros and cons to a yellow gun in conjunction with main gun(s), but these other points are outweighed by the pros and cons of double attacks in most scenarios.