Core Viewpoint - Ukraine has reportedly conducted a special operation using an unmanned underwater vehicle to strike a Russian submarine, marking a significant development in naval warfare capabilities [1] Group 1: Military Operations - The Ukrainian Security Service and Navy executed a joint special operation targeting a Russian military base in Novorossiysk [1] - This operation involved the use of the "Sea Baby" unmanned underwater vehicle, which successfully hit a 636.3 type "Warsaw Woman" class submarine, leading to an explosion and severe damage [1] - The submarine was docked at the port due to previous successful operations by Ukraine's "Sea Baby" surface vessel [1] Group 2: Response and Implications - As of the report, there has been no response from the Russian side regarding this incident [1]

Core Viewpoint - Ukraine's National Security Bureau reported the first successful strike on a Russian 636.3-class submarine using an unmanned underwater vehicle, resulting in an explosion and loss of operational capability for the submarine [1]. Group 1: Military Operations - The operation involved a joint special forces action by Ukraine's National Security Bureau and Navy against the Russian submarine docked at Novorossiysk port [1]. - The unmanned underwater vehicle, referred to as "Sea Baby," successfully targeted the submarine, which is capable of launching "Kalibr" cruise missiles against Ukraine [1]. - The submarine was forced to dock at Novorossiysk due to previous successful operations by Ukraine's "Sea Baby" unmanned surface vessel [1]. Group 2: Submarine Specifications - The 636.3-class diesel-electric submarine is an improved third-generation Kilo-class submarine, measuring 73.8 meters in length and 9.9 meters in width [2]. - It has a maximum speed of 20 knots, a maximum diving depth of 300 meters, and an endurance of 45 days, with a crew capacity of 52 personnel and a submerged displacement of 4,000 tons [2]. - The combat capabilities of this submarine model have significantly improved compared to earlier versions [2]. Group 3: Strategic Importance - Novorossiysk port is located on the eastern coast of the Black Sea in the Krasnodar Krai region of Russia and serves as a critical logistics supply facility for Russian operations in the Black Sea [3].