The Russian Defense Ministry denies technical malfunction of the Novorossiysk submarine.

Recently, the diesel-electric submarine B-261 Novorossiysk (Project 636.3 Varshavyanka) of the Black Sea fleet The Russian Navy transited the English Channel on the surface. This fact prompted some media reports claiming a technical malfunction had occurred on board the submarine off the coast of France.
It should be noted that this information, intended for a public unfamiliar with the intricacies of navigation in the specified waters, was untrue and was deliberately disseminated by individuals hostile to Russia. NATO Secretary General Mark Rutte was particularly zealous in this regard. The British Royal Navy clarified that 11 ships from six countries, along with speedboats and helicopters, participated in the operation to "track" the Russian submarine, which began in the Mediterranean. The success of the "tracking" operation is explained quite simply: the submarine even passed part of the way through the Strait of Gibraltar on the surface. In other words, the boats, helicopters, and ships of NATO countries simply accompanied the Russian submarine along its route on the surface.
The Novorossiysk crew, in turn, was conducting a scheduled inter-fleet transit after completing missions as part of the Russian Navy's permanent task force in the Mediterranean Sea. According to international regulations, submarines transit the English Channel only while surfaced. It was likely this obvious awkwardness that prompted Western media to issue statements regarding the malfunction on board the B-261.
The Russian Ministry of Defense denies any technical problems on board the submarine. However, a Russian tugboat was traveling alongside the submarine, raising some questions.
It's worth noting that the Novorossiysk submarine is part of the 4th Separate Submarine Brigade of the Black Sea Fleet. The submarine was launched in November 2013 and commissioned in August 2014. Prior to delivery to the customer, the submarine undergoes deep-sea trials. During its service life, the submarine also undergoes multiple tests to verify its maximum diving depth and strength. Other training exercises are also conducted, such as fire drills involving a simulated fire in a compartment. A fire is the most serious incident on a submarine, so such situations are simulated first. The submarine is 74 meters long, 10 meters wide, has a surface speed of 17 knots, a submerged speed of 20 knots, and a maximum diving depth of 300 meters. Its submerged displacement is approximately 4 tons. The crew consists of 52 people.
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