Thanks for your playtest, despite the poor UX at the current status.
The main inspiration is from early WWII (for ex https://en.wikipedia.org/wiki/Battleships_in_World_War_II). In "real" life, the main gun fires at about 2 rounds per minute - but I increased the frequency to allow more fun.
I'm not sure about the following cam, but I'll make an indicator for sure.