Rank/Rate	Machinist's Mate, Second Class
Birth Date	November 18, 1939
From	Painesville, Ohio
Decorations
Submarine	USS Thresher (SSN-593)
Loss Date	April 10, 1963
Location	Approximately 300 miles off the coast of New England
Circumstances	Most likely cause of the sinking was a failure in either a pipe, a pipe valve, or a hull weld, causing flooding near the engine room
Remarks

 

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  Helsius, Marvin Theodore