Other TopicsUSS Manta SS-299
The USS Manta was a United States Navy Balao-class submarine, named after a ray that was sometimes called a devilfish. This 311 foot long military version did not get much of an opportunity to be considered devilish, but she did her duty well nonetheless. Manta's power came from her propulsion of 4 x 9-cylinder opposed piston diesel engines driving electrical generators, 2 x 126-cell batteries, 4 x high-speed electric motors with reduction gears, and two propellers. This equipment enabled her to reach a top speed of 20 knots per hour when surfaced, and 9 while underwater. It was also responsible for her ability to dive to 400 feet and endure 75 days on patrol or 48 submerged hours at 2 knots, along with a range of 11,000 nautical miles if surfaced at 10 knots. Manta carried a complement of 81 sailors, as well as an armament of 10 x 21-inch torpedo tubes, 24 torpedoes, 1 x 5-inch / 25 caliber deck gun, and four machine guns.
A Late Start
Built by Philadelphia's Cramp Shipbuilding Company-and having finishing touches added at the Portsmouth Naval Shipyard in Maine-Manta's keel was laid down in 1943. Ten months later she was launched, but she had to wait another year to be commissioned. Finishing her fitting out and shakedown off the shore of Connecticut, Manta's maiden voyage began on March 27, 1945. She set sail through the Panama Canal and continued to Pearl Harbor, arriving there at the end of May to begin her war contribution. Assigned to a war patrol near Kurile Islands, Manta's tour of duty was uneventful, and in the midst of her mission, the Japanese surrendered.
Post-War Contributions
Manta thus traveled back to Hawaiian waters, arriving there in early September, and was ordered to take part in training operations for the remainder of the year. On the second day of 1946, she was sent to San Francisco, where she received an overhaul; she was decommissioned five months later and was a member of the Pacific Reserve Fleet. Three years after that, in August of 1949, Manta was re-commissioned and re-designated as an AGSS-299. She subsequently stood out for Key West, Florida, where she acted in the capacity as a target ship for experimental antisubmarine warfare. USS Manta performed her call to duty with the Atlantic Fleet's Operational Development Force for four years. In July of 1955, she followed orders to return to New England, and began her inactivation process in Portsmouth, New Hampshire. Unable to voyage back to New London, Connecticut, she was towed. Her decommissioning took place in December of 1955, and Manta officially became part of the Inactive Reserve Fleet. Five years later, Manta again resumed training duties in the Naval Reserve with the 3rd Naval District, but in 1967, was deemed to be of no more use to the military. Therefore, on July 16, 1979, she was stricken from the Navy List and sunk as an aircraft target off the shore of Virginia, near the Norfolk Naval Base.
Any vessel that was considered to be useless and then sunk probably elicits much sympathy from its former crew members. It wasn't Mantra's fault that her construction did not take place earlier and that she was unable to fully utilize her technology or sailors' skills in the war effort. But she served a valuable purpose in her training tasks and in her final role as an aircraft target. There is no documentation of any tragedy associated with the USS Manta, or even minor mishaps, accidents, or collisions. Her position was that of a behind-the-scenes support specialist, but just like the ships who scored hits and who sunk enemy vessels, she was revered and respected by her men. And, just like sailors onboard other submarines, the crew of the USS Manta faced risk-both in the face of enemy fire and in the threat of dangerous situations like fires aboard their ships. Yet another peril concerned the possibility of asbestos exposure. Asbestos was commonly used as an added insulation during construction of the mid-twentieth century; it had been found to be an excellent retardant against fire, heat, and electricity. It also seemed ideal for ships due to its lightweight consistency and ability to be squeezed into small spaces. Furthermore, since submarines had limited escape routes and resources, the threat of fire would have been feared almost as much as any enemy. The Navy tried to offer as much protection as possible, and the sealant around asbestos would have appeared to ensure the crew's safety. However, it is not known if the repeated diving and depth charge explosions would have shaken the vessel enough to cause rips in the sealant. Had that occurred, tiny fibers may have floated out of the sealant and into the ship's air system, where it may have been inhaled or swallowed by any sailor. Asbestos fibers could have remained inside crew member's bodies these many decades, and only now would the resulting effects of long-term irritation be seen in serious medical diseases and malignancies. That is why it is very important that anyone who served onboard the USS Manta see their doctor at the first sign of unusual physical symptoms, and then contact us for more information.
Submarines Index
- Mesothelioma-Causing Insulation Claims to be Settled by W.R. Grace & Company
2008-12-03 12:28:36
W.R. Grace and Company has recently reached a $60 million agreement that is aimed to settle property damage claims concerning asbestos-contaminated insulation. Home and business owners who used the at ...Read More
- Mesothelioma and Asbestos Awareness Day Inaugurated in Australia
2008-12-02 13:17:57
Losing her husband to a deadly asbestos-induced disease, Dorothy Roberts, 72, is one of 12 widows being portrayed during Australia's National Asbestos & Mesothelioma Day. The ACTU (Australian C ...Read More
- James Hardie Industries Provides Reason to Question the Asbestos Industry
2008-12-02 11:20:21
According to the corporate regulator in Australia, former directors and executives of James Hardie Industries have provided inaccurate, misleading, and deficient public announcements about the company ...Read More
Get an Asbestos Awareness Wristband. Read More

Asbestos.com now offers free assistance with your VA Claims. Read More![]() |

![]() | Mesothelioma Book |
Get a Free Copy of Lean on Me - Cancer Through a Carer's Eyes. Read More

Learn about asbestos exposure and legal options in your area. Read More






