The Bureau of Ordnance expected to reuse an earlier gun for Iowa, while the Bureau of Ships wanted lighter guns and turrets to meet the ship's speed requirement. That dispute illustrates how armament weight affects the rest of a capital-ship design. The classification used here places fast battleships and battlecruisers along a spectrum of protection, speed, and mission. Iowa remains a fast battleship, while Hood's post-Jutland alterations leave it a battlecruiser because a further shift would require a complete redesign. G3 sits near the boundary between the categories. Lexington's emphasis on speed and its intended role place it closer to the cruiser end.
Notable Point · 28:10-30:22
Iowa's gun-weight dispute and the battleship spectrum
Gun and turret weight shaped Iowa's design, while Hood, G3, and Lexington illustrate different balances within the capital-ship spectrum.