The Launch of Auxiliary Floating Dry Dock Medium 15: A Historic Milestone

On July 28, 2026, Austal USA marked a significant achievement in maritime engineering with the launch of the U.S. Navy’s Auxiliary Floating Dry Dock Medium (AFDM) 15. This marked the first medium dry dock constructed in over four decades, and it stands as the largest vessel the shipyard has launched in its rich 26-year history. Such milestones not only reflect the capabilities of Austal USA but also the advancements within maritime technology and operations.

Specifications and Size

The AFDM 15 is an engineering marvel that embodies both size and functionality. Weighing an impressive 12,000 tons and measuring 694 feet in length, this floating dry dock offers a working area of approximately 90,800 square feet on its deck. Its dimensions include a width of 157 feet and a height of 65 meters from the baseline to the wing deck. These specifications make it not only a substantial floating structure but also a vital asset to the naval capabilities of the U.S. Navy.

Launch Procedures

The meticulously planned launch process unfolded over several days. On July 25, 2026, the AFDM 15 was carefully transported from its assembly site in the Alabama Shipyard to the designated dry dock. The subsequent launch involved flooding the dock, allowing the massive platform to be towed into the river on July 28. This operation was a testament to the teamwork and intricate planning by various groups within Austal USA, including engineers, crane operators, and test specialists.

Recognizing the collaborative effort involved, Austal USA expressed gratitude to the U.S. Navy, the Alabama Port Authority Harbour Pilots, and various partners such as ASY, Berard Transportation, EN Bisso and Son Towing, and Crescent Towing. Each of these entities played a crucial role in making this launch successful.

Remarks from Leadership

In his statement, Austal USA President Gene Miller characterized the launch of the AFDM 15 as a proud moment not only for the company but also for the local workforce. He acknowledged the challenges faced during construction and celebrated the successful culmination of their efforts in seeing the dry dock launched into Mobile River. Miller emphasized the importance of industry support, which was instrumental in realizing this ambitious project.

Design and Functionality

The AFDM 15 is a Rennie-type floating dock that boasts continuous wing walls and strategically arranged pontoons. This design ensures both stability and enough displacement to facilitate the lifting and submerging of vessels. With an impressive 18,000 long tons lifting capacity, the AFDM 15 can accommodate destroyers and cruisers effortlessly. Its design aims to enhance operability and maintainability, ensuring that it remains a valuable asset for many years to come.

In creating the AFDM 15, Austal USA drew upon insights gained from operating a similar dry dock at its ship repair facility in Mobile, Alabama. This practical experience informed design decisions, ensuring the new dry dock effectively meets modern naval needs.

Strategic Importance

The AFDM 15 is not merely a feat of engineering; it is a strategic asset that enhances the operational and maintenance capabilities for the U.S. Navy. Floating dry docks are essential for the repair and upkeep of naval vessels, thereby keeping them operational and mission-ready. The AFDM 15’s advanced capabilities promise significant benefits for naval logistics and readiness in an increasingly complex maritime environment.

This launch stands as a milestone not only for Austal USA but for the broader U.S. Navy efforts to modernize and enhance its fleet. As maritime operations evolve with new technologies and strategies, the AFDM 15 will play a key role in supporting the future needs of naval operations and maritime security.

The successful launch and anticipated operational deployment of the AFDM 15 reflect a collaborative spirit and commitment to maritime excellence. As the landscape of naval engineering continues to advance, such projects underscore the importance of innovation and teamwork in achieving momentous achievements in maritime history.