H.M.S. Victory is the oldest commissioned warship (1765) but has been in dry dock as a museum ship since 1922.
U.S.S. Constitution is the oldest commissioned warship still in service (1797) but is no longer a warship but a sail-training ship.
Kommuna (formerly HIRMS Volkov under Imperial Russia and USSRS Kommuna under the Soviet Union) is the oldest commissioned warship still in active duty (1913)
H.M.S. Victory is the oldest commissioned warship (1765) but has been in dry dock as a museum ship since 1922.
U.S.S. Constitution is the oldest commissioned warship still in service (1797) but is no longer a warship but a sail-training ship.
Kommuna (formerly HIRMS Volkov under Imperial Russia and USSRS Kommuna under the Soviet Union) is the oldest commissioned warship still in active duty (1913)
Out of curiosity, I looked at some more ships from the list of oldest ships.
The Charles W. Morgan is the second oldest ship still afloat, after the U.S.S. Constitution. She was a whaler and is berthed in Mystic Connecticut.
The Tarihi Kadirga is the oldest surviving galley, an oar-powered ship type. Very neat.
The Pesse canoe is about 10,000 years old and is the oldest surviving watercraft, apparently. Boggles the mind!