Columbia submarine – The Defense Post

May- 2026 -

13 May

Rendering of the lead Trump-class battleship USS Defiant (BBG-1)

US Navy Unveils 30-Year ‘Golden Fleet’ Modernization Plan to Reach 450+ Ships

The US Navy has released a three-decade shipbuilding plan aimed at expanding its fleet beyond 450 vessels in the early 2030s while overhauling acquisition practices and rebuilding the maritime industrial base.

Mar- 2026 -

23 March

Americas

The pre-commissioning unit (PCU) Iowa (SSN 797) arrives for the first time at Naval Submarine Base New London in Groton, Connecticut, December 19, 2024. The future USS Iowa was delivered to Submarine Squadron (SUBRON) 4 from General Dynamics Electric Boat shipbuilding facility down river after recently completing a series of at-sea testing. The fast-attack submarine PCU Iowa and crew operate under SUBRON 4 and its primary mission is to provide fast-attack submarines that are ready, prepared, and committed to meet the unique challenges of undersea combat and deployed operations in unforgiving environments across the globe. (U.S. Navy photo by John Narewski)

Giulia Bernacchi

New Alabama Facility to Expand Production for US Nuclear Submarine Programs

Advanced manufacturing firm Hadrian has opened a new facility in Alabama to produce components for US Navy submarine programs.

19 March

Americas

An artist rendering of a Columbia-class nuclear submarine breaching the surface. The top half of the submarine can be seen above the water surrounding it.

Christine Casimiro

General Dynamics Lands $15B to Advance Columbia-Class Submarine Program

The US Navy has awarded General Dynamics Electric Boat a $15.38-billion contract modification to support, sustain, and accelerate the Columbia-class submarine program.

Feb- 2026 -

20 February

Air

Bea Castañeda

UGM-133 Trident II: America’s Submarine-Launched Ballistic Missile, Explained

This explainer outlines the UGM-133 Trident II’s role aboard ballistic missile submarines, and why it remains central to US deterrence strategy.

19 February

Americas

The Virginia-class attack submarine USS Texas.

Giulia Bernacchi

L3Harris Lands Largest Submarine Comms Deal for Virginia, Columbia Fleets

L3Harris has secured its largest full-rate production agreement to date for submarine communications equipment.

13 February

Americas

HII’s Newport News Shipbuilding division has delivered the first Columbia-class ballistic missile submarine stern to General Dynamics Electric Boat (Photo by Ashley Cowan/HII)

Rojoef Manuel

Lead US Navy Columbia Submarine on Track for 2028 Delivery After Supplier Delay

The US Navy has said it is on schedule to receive its first platform under the Columbia-class nuclear-powered ballistic missile submarine program in 2028 and expects full-rate production by 2031.

6 February

Sea

Bea Castañeda

Stealth, Power, Deterrence: Inside the Columbia-Class Submarine

Dive into the Columbia-class submarine, the US Navy’s next-generation ballistic missile platform set to replace the aging Ohio-class.

Jan- 2026 -

8 January

Americas

Electric Boat's Atlas floating dry dock for Columbia submarine construction

Rojoef Manuel

General Dynamics Receives Special Dry Dock for Columbia Submarine Development

General Dynamics Electric Boat has accepted the floating dry dock tasked with supporting the construction of the US Navy’s Columbia-class nuclear-powered ballistic missile submarines.

Nov- 2025 -

18 November

Americas

Rojoef Manuel

General Dynamics Wins $2.28B Deal to Accelerate Production of Next Columbia Submarines

The US Department of Defense has awarded General Dynamics Electric Boat a $2.28-billion contract to advance procurement and construction of five Columbia-class fleet ballistic missile submarines.

Sep- 2025 -

2 September

Americas

Rojoef Manuel