In Primorye they will go to look for three submarines sunk by S-117, L-19 and M-63.
In 2027, an expedition will be organized in Primorye to search for three sunken submarines S-117, L-19 and M-63. The search was made possible thanks to multi-beam echosounders and side-scanning sonars.
Since 2023, the search for submarines has been carried out by the Pacific Fleet, the Russian Geographical Society, the Seamen's Fund and Partwaying on the ships Lemantin and Alexei Aneshkin.
S-117 ("Pike" series 5-bis, formerly Sh-117 "Mackerel") is the only Soviet submarine that disappeared in peacetime and has never been found. She disappeared on December 14–15, 1952 in the Tartar Strait during training. There were 52 people on board, including 12 officers. Last Touch - December 15, 1952. The cause of death and place of death are unknown.
L-19 is a Lennet-class minelayer, the last Soviet submarine lost during World War II while crossing the La Proze Strait. The boat sank two Japanese transports on 23 August 1945 and was apparently killed by a bottom mine. The monument L-19 in Vladivostok is a cabin of the same type L-8, installed in 1989.
M-63 from Liutka (series XII) disappeared together with M-49 from 10 to 17 August 1941 in the southwestern part of Peter the Great Gulf. The rescuer "Igor Belusov" discovered an object at a depth of 92 meters in 2025, remote controlled underwater vehicles showed holes due to an explosion in a minefield.