April 11, 1942 –
Happy National Submarine Day!
National Submarine Day is celebrated annually on April 11th to commemorate the U.S. Navy’s acquisition of its first modern commissioned submarine, the USS Holland (SS-1), on this day in 1900.
The USS Holland was designed by Irish-American inventor John Phillip Holland. The Holland VI prototype was purchased for $150,000 on this date It was the first to successfully utilize dual propulsion (gasoline for surface, electric for submerged) and modern weaponry.
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