Seydlitz's belt reached 11.8 inches at its strongest point but tapered sharply and protected less hull depth and volume than a battleship's citadel. Five twin 11-inch turrets carried effective built-up L/50 guns with substantial penetration capability. Twelve 150 mm guns were intended to keep off smaller cruisers, torpedo boats, and destroyers. The 88 mm weapons were described as theoretically anti-aircraft guns but were also used against small surface threats, making their placement and firing arcs important to the ship's self-defense.
Chapter · 29:41-31:50
Seydlitz's armor, 11-inch guns, and secondary battery
The ship paired high-quality but limited armor coverage with capable built-up 11-inch guns and secondary weapons intended for light surface and air threats.