Strategy Page on some extremely old ships still in service in various navies:
Last year, the British Royal Navy retired its oldest warship still in service, the 4,700 ton HMS Caroline. This light cruiser entered service in 1914 and fought in the epic Battle of Jutland in 1916. After World War II, Caroline served as a training ship, mostly tied up at dockside. When decommissioned last year, the ship could no longer move under her own power.
The Caroline was not the only World War I warship still in service. Currently, the oldest ship still in service is the Russian salvage ship VMF Kommuna. This 2,500 ton catamaran was built in the Netherlands and entered service in 1915. Kommuna began service in the Czar’s navy, spent most of its career in the Soviet (communist) Navy, and now serves in the fleet of a democratic Russia. Originally designed to recover submarines that had sunk in shallow coastal waters, Kommuna remains in service to handle smaller submersibles, does it well and has been maintained over the decades to the point where it cheaper to keep the old girl operational, than to try and design and build a replacement.
Most navies would not want to bring attention to their oldest ship, especially if it was nearly a century old. It’s different in the American Navy. For example, three years ago the carrier, USS Kitty Hawk (CV 63) was finally decommissioned, and ceased to be the oldest ship in the fleet. The Kitty Hawk served for 48 years and 13 days. In that time, about 100,000 sailors served on the ship. The ship was the navy’s last non-nuclear carrier and, since 1998, the oldest ship in commission. “The Hawk” did not age well, and had lots of breakdowns in its final years. This led members of the crew to nickname the ship; “Shitty Hawk”.