Dreadnought carried ten 12-inch guns in five twin turrets as her main battery. She also mounted 27 single 12-pounders for defence against destroyers. Five 18-inch torpedo tubes provided another form of offensive firepower. The term "all-big-gun" referred to the uniform heavy battery; smaller defensive weapons and torpedoes remained aboard.
Chapter · 14:10-15:02
Main guns, anti-destroyer weapons, and torpedo tubes
Dreadnought's armament combined ten 12-inch guns with 12-pounders for destroyer defence and five torpedo tubes.