Hi, actually, the crams aren't real. They're mimics. Behind are hidden decoy missiles with harpoons. It has some heavy armour but with testing, not enough. I agree on the torpedoes. Sonars are also hidden throughout the submarine with decorations (see cylinder atop the sub and on the sides) Thank you for the tips!

Looks very nice alas shave the crams, they're way too slow to hit anything esp underwater. Steel not heavy armor also what is it even doing. Steel on the sides not alloy you won't need it to be floaty once the mass from heavy armor is removed. Spread your torpedo tubes out into multiple hardpoints so 1 hit doesn't disarm you. Protect your large torpedoes with something. Consider having a rearward missile launcher shooting harpoon with 100m cable that doesn't break, regulators to make it last longer and sonar decoys. Where are your sonars? Add more.