O'Byrne-class_submarine
The O'Byrne-class submarines were a class of three submarines built for the French Navy from 1917 to 1921. They were originally ordered by the Romanian Navy, but were confiscated by the French government while still under construction. Three ships of the type were built between 1917 and 1921 at the Schneider shipyard in Chalon-sur-Saône. They were commissioned in the French Navy, serving in the Mediterranean Sea. The ships were removed from the Navy list between 1928 and 1935. The first ship of its class was named in honour of French submariner Gabriel O'Byrne.