Bringing Back the Battleship? - Railguns, US Shipbuilding and a 35,000 ton bad idea?

Quick Overview

The proposed USS Defiant (BBG-1), the first of the so-called Trump class guided missile battleships, represents a massive, technologically risky pivot for the US Navy that analysis suggests is highly inefficient compared to existing and planned destroyer classes, particularly because it replaces the planned DDGX next-generation destroyer program.

Key Points: The USS Defiant concept is proposed as a 35,000-ton guided missile battleship (BBG) that incorporates VLS cells, hypersonics, lasers, and a forward-mounted 32-megajoule rail gun, making it the largest US Navy surface combatant since WWII. The design details suggest the Defiant is dimensionally close to the Iowa-class battleships (length 840-880 ft vs 860-890 ft; beam 105-115 ft vs 108 ft), but its primary firepower is missile-based, with only two 5-inch guns and the rail gun listed as secondary battery systems. Analysis shows the Defiant is highly inefficient for missile carriage; for every missile point carried (estimated 160 points total), it requires about 219 tons of displacement, compared to 77 tons per point on the retiring Ticonderoga class cruiser (130 points). The program is considered high-risk because it relies on immature technology, specifically the 32-megajoule rail gun, a system the US Navy previously shelved in 2021 due to challenges like barrel life and low rate of fire (aiming for 10 shots per minute, testing achieved half that). Crucially, the announcement states the Defiant class replaces the Navy's previous plans to develop the DDGX next-generation destroyer, meaning the BBG-1 program necessitates pivoting all development resources away from that planned 15,000-ton destroyer. Resource intensity comparisons indicate the Defiant costs roughly $9.1 billion per hull (CSIS estimate), making it 2-3 times as resource-intensive as comparison ships like three Flight 3 Arleigh Burke destroyers or two DDGX concepts, yet it carries fewer VLS cells than the combined alternatives. The ship's proposed mission set is diffuse, incorporating amphibious support (V-22 Osprey capable), command functions, secondary nuclear weapon delivery, and extensive anti-drone defenses (lasers, rail gun), suggesting it is a multi-purpose 'luxury buy' rather than a focused peer competitor.