How Many US Submarines Have Been Lost at Sea?

Check out this answer from Consensus:

The loss of US submarines at sea is a somber reminder of the inherent risks associated with naval operations. Each incident not only represents a loss of valuable naval assets but also the tragic loss of life. Continued research and technological advancements aim to mitigate these risks, ensuring the safety of submariners and the effectiveness of submarine operations.

The history of the United States Navy is marked by numerous achievements and advancements in naval technology. However, it is also punctuated by tragic losses, including the sinking of submarines. This article explores the number of US submarines lost at sea, drawing on historical records and recent research.

Historical Context

Submarines have been a crucial part of the US Navy since their inception. They have played significant roles in both World Wars, the Cold War, and continue to be vital in modern naval strategy. However, the operation of these complex vessels has not been without risk.

Notable Incidents

USS Greeneville and Ehime Maru Collision

One of the more recent and well-documented incidents involving a US submarine is the collision between the USS Greeneville (SSN 772) and the Japanese fishing training boat Ehime Maru on February 9, 2001. The collision occurred south of Honolulu, Hawaii, resulting in the sinking of the Ehime Maru within minutes. Despite rescue efforts, nine of the 35 crew members were initially unaccounted for, with eight eventually recovered and identified1.

USS Bugara

Another significant incident is the sinking of the ex-USS Bugara (SS/AGSS331). This World War II-era submarine sank while under tow in 1971. An archaeological survey conducted in 2017 provided detailed observations and documentation of the wreck. The survey revealed that the Bugara, which had been modernized during the Cold War, was ultimately used as a target for the Mark 48 torpedo, reflecting its role in Cold War naval strategy2.

Total Number of Submarines Lost

While the exact number of US submarines lost at sea varies depending on the source, historical records indicate that at least 52 submarines were lost during World War II alone. These losses were due to various causes, including enemy action, accidents, and unknown circumstances. Post-World War II, additional submarines have been lost due to accidents and other incidents, such as the USS Thresher (SSN 593) in 1963 and the USS Scorpion (SSN 589) in 1968.