![]() She was purchased by the Navy after rigorous tests, and six more of her type were ordered. This was the first submarine having power to run submerged for any considerable distance. Holland continued to improve his designs and worked on several experimental boats prior to his successful efforts with the privately built Holland launched in 1898. In 1875 his first submarine designs were submitted for consideration by the U.S. Holland came to the United States in 1873. As a youth, he considered the use of the submarine to further the cause of Irish Independence. Navy (spending 57 of his 74 years working with submersibles), was born in Liscanor, County Clare, Ireland, on 29 February 1840. ![]() John Philip Holland, the man who developed the first true submarine accepted by U.S.
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