If there's one Battleship (more than any other), that best illustrates the requirement of, mounting as many naval guns on your battleship (as possible), then there's no finer example, than the Royal Navy's - HMS Agincourt:
HMS Agincourt (of 1913), mounted no fewer than, fourteen twelve-inch naval guns (in seven twin-turrets). This was done, to both maximise her fire-power, and increase the chances of hitting, an enemy battleship. I like the fact, that her turret arrangement, adhered to the principles of Naval Conflict, that had been learned in the days of Nelson's - HMS Victory: the more guns you have, the more fighting power, your warship - brings to bear :) And yet, perhaps unlike the days of HMS Victory, did this maximisation of guns - come with a price tag! In the case of Agincourt, carrying so many turrets (seven), meant that their weight had to be paid for, at the expense of adequate - armoured protection ... For me, this was particularly apparent, upon the thinness of her belt armour (up to nine inches), the thinness of her deck armour (up to two and a half inches), and the thinness of her bulkheads (up to six inches). Of these, I would say that it's the bulkheads thickness, that would concern me the most - as having seven gun turrets, could easily mean, that a fire/explosion, in one of their magazine's/shell handling room's, could easily spread, to an adjacent gun turret/group of turrets! And given the fact, that HMS Agincourt was regarded (amongst the Royal Navy), as a floating magazine - leads little to the imagination ... Despite this, did HMS Agincourt, have several features to her profile, that I quite liked ... First: was the fact that Agincourt, mounted all of her primary naval guns, on the centreline, of her hull form. This meant that she could bring all, primary guns to bear, on both port and starboard - which maximised her broadside. The adoption/standardised use of centreline turrets, went hand-in-hand, with the Space Age Idea, of super-firing turrets (where one turret's roof, was directly beneath, another turret's barrels). In the case of Agincourt, did this lead to an interesting arrangement, of her aft turrets - a little group of three, that was somewhat unique, in their layout :) Second: having so many primary naval guns (fourteen twelve-inch), was it also a key requirement, for the shell spotters, to have an unimpeded line-of-sight, towards the enemy. Thus, is it good to see, that her forward lookout platform (that's mounted atop the forward-most tripod mast), is actually located, in-front of the forward-most smokestack :) Third: Where as HMS Dreadnought (the so-called grandfather of all later/better battleships), had for the most part, omitted any (dedicated) secondary armament - the same could not be said, for HMS Agincourt. In the case of Agincourt, do I like the fact, that she featured twenty six-inch guns - that were all grouped, within the central third, of her hull form. For me, the inclusion of six-inch (surface target) guns, reflected a decent realisation of the (potential) menace of Destroyers and Patrol Boats (who could both launch torpedoes!). Yet here, do I find, that there's a secondary armament feature, that I was not so keen on ... The fact that her six-inch guns, were case-mated (i.e. built into the hull form), and that they were situated (mostly) beneath main deck level, meant that they would have been unusable, in anything but - a calm sea! Despite this, the inclusion of a (powerful) secondary armament, meant that Agincourt, did at least cater for, two different ranges, of Naval Engagement - both long range (with her twelve-inch guns), and short/medium range (with her six-inch guns). Which really was, a step in the right direction :) Overall: HMS Agincourt, was a (somewhat) novel solution, to the conflicting Naval requirements - of both maximising fire-power, and maintaining survivability. Ironically, the spread of her seven turrets, both aided survivability (as the chances of an enemy shell, knocking them all out - was much reduced), but the chances of an enemy shell, knocking out the entire battleship, was much increased (as the turrets were housed within a hull form, that did not have enough - armoured protection).