How practical would a detachable-hull design be for an ocean-going warship?
Short answerNot very: salt water, structural loads, watertight seals, and the need to reconnect control systems would make the joints fragile and maintenance-intensive.
NotesAn ocean-going warship would struggle to use a detachable-hull arrangement safely. Salt water is an exceptionally hostile environment for moving joints, seals, electrical connections, and control systems. Every separation point would have to carry the ship's structural loads while remaining watertight and reconnecting reliably after exposure and corrosion. The concept adds failure points and maintenance burden to the part of a ship that most needs continuity and strength.