U.S. Navy - Floating Dry Docks
Medium Floating Dry Docks (AFDM)
The medium auxiliary floating dry docks - designated AFDM - could lift up to 18,000 tons, large enough to drydock destroyers and light cruisers at forward operating bases. Fourteen were built between 1943 and 1945, providing the fleet with mobile repair infrastructure that eliminated the need to send damaged warships thousands of miles to stateside shipyards. Remarkably, two of these WWII-era docks - Resolute (AFDM-10) and Steadfast (AFDM-14) - remain in active U.S. Navy service in 2026, over eighty years after their construction.
AFDM-1
Medium Floating Dry Dock
1943
Built
18,000
Lift Capacity (tons)
DDs/CLs
Serviced
First medium dock, capable of lifting full-size destroyers at forward Pacific anchorages.
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AFDM-2
Medium Floating Dry Dock
1943
Built
18,000
Lift Capacity (tons)
DDs/DEs
Serviced
Towed to forward bases for destroyer and destroyer escort hull maintenance operations.
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AFDM-3
Medium Floating Dry Dock
1943
Built
18,000
Lift Capacity (tons)
DDs/CLs
Serviced
Served across the Central Pacific lifting destroyers and light cruisers for battle damage repair.
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AFDM-4
Medium Floating Dry Dock
1943
Built
18,000
Lift Capacity (tons)
DDs/MSOs
Serviced
Operated at Pacific fleet anchorages providing drydocking for destroyers and ocean minesweepers.
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USS Resourceful
Medium Floating Dry Dock
1944
Built
18,000
Lift Capacity (tons)
DDs/CLs
Serviced
Named medium dock that provided critical destroyer and light cruiser repair at advanced bases.
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USS Competent
Medium Floating Dry Dock
1944
Built
18,000
Lift Capacity (tons)
DDs/DEs
Serviced
Named dock that serviced destroyers and escorts during the Western Pacific campaigns.
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USS Sustain
Medium Floating Dry Dock
1944
Built
18,000
Lift Capacity (tons)
DDs/CLs
Serviced
Atlantic-based medium dock providing destroyer and cruiser maintenance for the fleet.
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USS Richland
Medium Floating Dry Dock
1944
Built
18,000
Lift Capacity (tons)
DDs/CLs
Serviced
Named for Richland, Washington; served in the Pacific lifting destroyers and light cruisers.
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AFDM-9
Medium Floating Dry Dock
1944
Built
18,000
Lift Capacity (tons)
DDs/DEs
Serviced
Deployed to Pacific forward areas for destroyer and escort vessel drydocking operations.
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USS Resolute
Medium Floating Dry Dock
1944
Built
18,000
Lift Capacity (tons)
DDs/FFGs
Serviced
One of two medium docks still in active Navy service as of 2026, serving over 80 years.
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AFDM-11
Medium Floating Dry Dock
1945
Built
18,000
Lift Capacity (tons)
DDs/CLs
Serviced
Completed near war's end and assigned to postwar Pacific Fleet maintenance duties.
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AFDM-12
Medium Floating Dry Dock
1945
Built
18,000
Lift Capacity (tons)
DDs/DEs
Serviced
Atlantic Fleet medium dock providing destroyer drydocking through the postwar period.
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AFDM-13
Medium Floating Dry Dock
1945
Built
18,000
Lift Capacity (tons)
DDs/MSOs
Serviced
Late-war medium dock that served through the Cold War era in Pacific fleet maintenance.
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USS Steadfast
Medium Floating Dry Dock
1945
Built
18,000
Lift Capacity (tons)
DDs/FFGs
Serviced
Still in active Navy service as of 2026 - over 80 years of continuous fleet support.
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No units found matching your search.
14
Docks Built
18,000
Lift Capacity (tons)
2
Still Active (2026)