And it must have taken brass balls to know that each ship you where attacking had at least 4 of the things trained on you at any given time...not to mention the ones from other ships in the formation. I heard somewhere that Japanese pilots would sometimes fly wave height in the hopes that the gunners would accidentally start shooting other ships in the formation.
What tiny patrol boat is that thing mounted on? You should always have a hull big enough for a couple of the 40mm's and at least one of these...