Naval Historywith Dr. Alex

Q&A · 2:14-2:39

Why semi-submersible battleships found no role

The semi-submersible battleship concept loses mobility as it lowers itself, leaving only a narrow possible role for small stealthy attack craft.

BattleshipsCoastal Attack CraftFortificationsLow FreeboardMobilityNaval ArchitectureSemi SubmersiblesShip DesignStealth Ships
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Question

Why did the idea of a semi-submersible battleship never take off?

Short answer

Submerging would sacrifice mobility and make the ship behave like a fort; only small low-profile attack craft offer a plausible niche.

Notes

Submergence conflicts with the qualities expected of a battleship. Lowering the hull would sharply restrict movement and turn the vessel into something closer to a stationary fort. That loss of mobility undercuts the reason to concentrate battleship-scale guns and protection in a seagoing vessel. A much smaller attack craft could use a low profile for a stealthy approach, but the concept offers little to a capital ship.