P 4 torpedo boats sank the Evarts-class frigate Tai Ping (ex-USS Decker) off the Dachen Islands. All Chinese P 4 torpedo boats have been decommissioned, and 4 were transferred to the Bangladesh Navy in 1983. Some of the surviving Chinese units were converted into target drones, and thus returned to service, functioning as minor support auxiliaries controlled by converted gunboats. 12 P 4 torpedo boats would be exported to North Vietnam in 1961. Three of them (T-333, T-336, and T-339) launched an abortive attack on the American Allen M. Sumner-class destroyer in August 2, 1964, starting the Gulf of Tonkin incident (see Edwin E. Moise, Gulf of Tonkin and the Escalation of the Vietnam War (Revised Edition), Naval Insitute Press, 2019, pages 52-63). The vessels T-1 and T-3 of the Cyprus Navy were dispatched to engage the first Turkish flotilla at Operation Atilla as it approached Kyrenia. One vessel was destroyed by air attack, and the other by artillery from Turkish destroyers. Variants Project 123-bis: also known as B-123, original P 4 class torpedo boat design with two twin DShK heavy machine guns and Packard petrol engines. Project M123-bis: B-123 with Soviet M-50 diesel engines. Project 123-K: also known as K-123, P 4 class torpedo boat with KPV heavy machine guns and radar, slightly larger than B-123. Project K123-K: K-123 boats fitted with a A-10bis forward hydrofoil. Project 123-U: K-123 boats converted to target ships with remote control systems. 2 B-123 boats were fitted with the A-10 and A-11 forward hydrofoil. 6 K-123 boats were converted to gunboats, with their torpedoes removed and a second pair of KPV machine guns added. Egyptian variants Project 123-K with Rocket Launcher: K-123 boat with an eight barrel rocket launcher fitted. One example was captured by Israel. Surviving boats 36 in Baltiysk, Kaliningrad Oblast 60 in Komsomolets Torpedo Boat Memorial, St. Petersburg 119 in Phoenix Mountain Camp, Tianjin. 123 in Kaliningrad Oblast 131 in Victory Museum, Moscow 158 "Meritorious Torpedo Boat" in the Military Museum of the Chinese People's Revolution, Beijing. 341 in Pamyatnik Geroicheskim Moryakam Chernomortsam, Novorossiysk K-12 in Ha'apala and Israeli Navy Museum, Haifa T-8224 in Bangladesh Military Museum, Dhaka Unidentified in Kaliningrad Unidentified in Diorama, Sevastopol Unidentified in Katernikov Square, Kronstadt References Notes Bibliography Torpedo boat classes Torpedo boats of the Soviet Navy Torpedo boats of the People's Liberation Army Navy