Chuck Hill's CG Blog

Chuck Hill's CG Blog

Category Archives: Ukraine

“Ukraine Sinks Russian Navy Missile Corvette In Drone Boat Attack” –The War Zone

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The War Zone reports,

“A dramatic new view released by the Ukrainian Defense Intelligence Directorate (GUR) shows several of its uncrewed surface vessels (USVs) strike and sink the Russian Tarantul-III class missile corvette Ivanovets. The attack took place Wednesday night local time on the Black Sea near Lake Donuzlav in western Crimea, the GUR said on its Telegram channel.

“A 128-second video posted on Twitter shows what appears to be a complex attack on the Ivanovets by what Lt. Gen. Kyrylo Budanov, commander of GUR, told us were Maritime Autonomous Guard Unmanned Robotic Apparatus (MAGURA V5) USVs operated by the GUR’s Group 13 drone unit.”

Tarantul-class corvette

The vessel in the video is a Tarantul class missile corvette. These vessels are powered by four engines totaling 32,000 HP making them very fast (42 knots). The hot gas turbine exhausts on either side of the transom glow brightly early in the video.

They have a pair of 30mm gatling guns on the aft superstructure with a clear field of fire aft.

This ship appears well equipped to defeat an unmanned surface vessel (USV) attack.

The Drive post analyses the attack, but I would point out that I don’t see as many splashes as I would have expected, if the 30mm guns were functioning. I don’t see muzzle flashes. What I did see appeared to be from heavy machine guns (12.7 or 14.5mm) rather than 30mm.

Many USVs were involved in this attack. The Ukrainians claimed six USVs hit the little corvette. Still other USVs filmed the ultimate explosion and sinking.

Perhaps the 30mm guns had run out of ammunition engaging other USVs by the time the drone in the first video recorded attack gets as close as seen in the video.

The report included this statement,

““The Ivanovets MRK sank while repelling a night attack by the Ukrainian Armed Forces on Sevastopol,” the Russian VoenkorKotenok Telegram channel wrote.”

The Russians have historically stationed a “guard ship” off their ports to prevent surprise attack. Ivanovets may have been stationed off Sevastopol specifically as a counter to a drone attack.

“Ukraine hits Russian Buyan cruise missile carrier and Pavel Derzhavin vessel with drones” –Ukrainska Pravda

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©Sea Baby dron. screenshot.
© Ukrainska Pravda

Ukrainska Pravda reports,

The Security Service of Ukraine, together with the Ukrainian Navy, has attacked the Buyan cruise missile carrier and the ship Pavel Derzhavin using experimental weapons on uncrewed surface vessels…both vessels were hit by Sea Baby drones with experimental weapons.

The Buyan cruise missile carrier or Buyan-M (that is the name of the class, not a specific ship) is a small, 949 ton full load, 75 meter (246′) corvette armed with up to eight cruise missiles similar in capability to the American Tomahawk.

Buyan-M class corvette, Volgodonsk in Astrakhan. Author Anton Blinov, via Wikipedia.

Pavel Derzhavin is a Project 22160 class patrol ship, a bit bigger than the Buyan-M at 94 meters (308 ft) in length, but not as heavily armed.

Russian Project 22160 Patrol Ship Dmitriy Rogachyov in Sevastopol, 12 April 2019. Photo from Ministry of Defence of the Russian Federation.

I found the reference to “Sea Baby drones with experimental weapons” interesting, not that the Sea Baby drone was experimental, so I presume the warhead was experimental. Various reports seem to indicate the explosion was extremely loud and created a great deal of smoke. This could have been the result of secondary explosions.

It is not clear if the two ships were sunk.

Information about the source here.

“Southern Command: Russia disperses ships in fear of Ukrainian strikes” –Kyiv Independent

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A map showing the location of the Black Sea and some of the large or prominent ports around it. The Sea of Azov and Sea of Marmara are also labelled. Created by User:NormanEinstein, Wikipedia

Kyiv Independent reports,

Russia has dispersed its naval forces in the Black Sea between the southeastern coast of Crimea and Novorossiysk in fear of Ukrainian surface drone strikes, Southern Command spokesperson Natalia Humeniuk said on Aug. 18.

Well, the US Navy is all a twitter about “Distributed Maritime Operations” (DMO) so is this a good idea for the Russian Black Sea Fleet? Like most such questions, it depends.

It depends on how good Ukrainian intelligence is. The supposed advantage for the Russian Fleet would be that their ships are harder to find, but is this case? Not only does Ukraine have access to some Western intelligence sources, but they seem to have good independent intelligence. All their successful USV attacks seem to have been against valid targets though there are many more potential targets that were not directly supporting the Russian military. When Russian ships are in port, the Ukrainians are going to know it.

Convoying has been a feature of Naval Warfare for over a thousand years because it is a defensive tactic that takes the choice of where and when to concentrate out of the hands of the offense. Spreading out the potential targets requires diluting the defense. That leaves the choice of where and when to concentrate effort in the hands of the Ukrainians.

To be successful, the defense has to detect all of the incoming USVs at a distance from their target and have sufficient numbers of countermeasures systems, in the right place, to engage all incoming USVs as they are detected.

The Ukrainian USVs don’t seem to be too hard to defeat once they are detected. Most of the successful countermeasures seem to have used machineguns, but you need one or more within effective range to engage every attacking USV.

The Ukrainians have told the world that no Russian Black Sea port is safe.

On August 4, Ukraine’s maritime authorities issued a “war risk area warning” to all international mariners headed for six Russian Black Sea ports, including Novorossiysk and the smaller oil-exporting terminals of Tuapse and Taman. The warning is scheduled to go into effect on August 23 and continue “until further notice” (Interfax-Ukraine, August 5). And on August 8, Zelenskyy’s economic adviser Oleh Ustenko told US media that “everything the Russians are moving back and forth on the Black Sea are our valid military targets,” including oil tankers or terminals.

When you multiply the number of points you have to defend, you divide your defensive force. USVs are cheap and readily produced. Ukraine will not have trouble finding targets. Ukraine will attempt to overwhelm the defenses by creating situations where even if the defense is taking out say four out of five or six out of seven attacking drones, the Russians still loose, even if it is only one ship at a time.

Damage Resulting from Ukrainian USV Attacks –The Drive

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The Drive provides information showing the results of Ukrainian Unmanned Surface Vessel (USV) attacks on a small Russian tanker and a Russian Navy LST. Reportedly the USVs were equipped with 450 kg of explosives (about 1000 pounds). The explosions occurred essentially at the waterline. Had the explosions occurred well below the waterline, or particularly below the keel, the effect would have been greater. Even in the photo above, it appears the explosion cause more damage below the waterline than above. Had it been well above the waterline, the effect on the ship would probably have been less, but similar sized bomb or missile hits on the superstructure would likely have caused more personnel casualties.

Our First Look At Hole Blasted Into Russian Tanker By Ukrainian Drone Boat

Guns for Ukrainian Island Class Patrol Boats.

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Ukrainian Navy Island-class patrol boats, formerly of the U.S. Coast Guard, conduct maritime security operations in the Black Sea off the coast of Odesa, Ukraine.
UKRAINIAN NAVY

This was on the U.S. Department of Defense Daily Digest Bulletin for Aug. 7, 2023.

Safe Boats International LLC,* Bremerton, Washington, is awarded a $22,271,829 firm-fixed-price modification to previously-awarded contract N00024-21-C-2201 for the exercise of options for procurement and installation of six Gun Weapon Systems onto the Island Class patrol boats with spares. Work will be performed in Tacoma, Washington, and is expected to be completed by October 2024. Foreign Military Financing (Ukraine) funds in the amount of $22,271,829 will be obligated at time of award and will not expire at the end of the current fiscal year. The Naval Sea Systems Command, Washington, D.C., is the contracting activity. (Awarded Aug. 3, 2023)

Five Island class 110 foot patrol boats were transferred to Ukraine.  One of them has been sunk.

Previously vessels of this class were armed with crew served Soviet era 25 mm guns.

This is reported as modification of an existing contract, so I presume at least one vessel has already been rearmed. Thinking two guns per vessel, then six gun systems will go on three additional vessels. So, at least four ships with two guns each. Presumably, they would be 25 or 30 mm guns, hopefully the new 30mm Mk38 Mod4.

The announcement does say, “Work will be performed in Tacoma, Washington, and is expected to be completed by October 2024.” If this is true, these are additional boats. The Coast Guard still has many available for transfer. It is also possible there might be only one gun per vessel. All we know for sure is in the quote above.

In Dec. 2019 there was a suggestion that these vessels might be fitted with anti-ship cruise missiles, but there has been nothing further to indicate it has or will happened.

“Ukraine Situation Report: Photos Show Damage To Russian Tanker After Drone Boat Strike” –The Drive

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The Drive has an excellent report on the sea drone attack on Russian Tanker Sig, including photos of the damage.

Looking at the video above, it is apparent that it starts with the unmanned surface vessel alongside ship or structure which might have been a point of reference. It makes a sharp high-speed turn until about time 0:19, when the target came clearly into view at a relatively short distance. This is a 37 second video, assuming 40 knots the UAS could go 4,000 yards in three minutes or only about 822 yards in the 37 seconds. The last 18 seconds when the UAS is pointed at the target would be a distance of about 400 yards.

The post also notes that Ukraine has declared six Russian Black Sea ports subject to “War-Risk.”

“Northern Fleet ship seriously damaged in drone attack” –The Barents Observer

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The Barents Observer provides the most complete report I have seen on a recent attack on a Russian Landing ship (LST). It identifies the ship as the Olenegorsky Gornyak, a Ropucha-class landing ship. It was in serious danger of sinking because a vehicle deck stretches the length of the hull.

I think this type of threat may be something the Coast Guard may want to seriously consider since the Coast Guard is the likely agency to defend against it.

A few comments on the conduct of the attack. It was a night attack. It would be interesting to know if the moon was down when the attack was made. It appears there was a lot of light coming from the bridge of the target ship that may have adversely effected night vision. The UAS appears to have used a slow approach, which would have been less likely to attract attention than a high-speed approach, which would have left a phosphorous wake. The target vessel appears to have been unaware of the approach. I see no defensive fire from the target vessel. The target vessel appears to be stopped or moving very slowly because, when the USV steadies up, there is little or no bearing drift.

“Videos of Ukrainian drone boats swarming a Russian target end in explosion, mystery” –Task and Purpose

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Task and Purpose brings us a report on an apparent drone attack on a Russian Electronic Intelligence ship, “Ivan Khurs,” including two videos, the second of which is reproduced above.

“Though there is no way to confirm the outcome of the attack — or even the legitimacy of either video — if the second boat triggered an explosion similar to the one seen in the first video, the Russian ship likely suffered serious damage.”

“The Ukrainian Navy and the Fight for Democracy” –USNI

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Ukrainian Navy Island-class patrol boats, formerly of the U.S. Coast Guard, conduct maritime security operations in the Black Sea off the coast of Odesa, Ukraine. UKRAINIAN NAVY

The US Naval Institute’s May 2023 issue of “Proceedings” includes an article by Vice Admiral Oleksiy Neizhpapa, Ukrainian Navy discussing the Ukrainian Navy’s role in the war with Russia.

Because the Ukrainian Navy used all available assets, including unmanned vehicles, it has achieved a strategic effect. We forced the enemy fleet to move east of the meridian of Cape Tarkhankut (Crimean Peninsula) and denied Russian operational activity in the northwestern part of the Black Sea, even near Crimean harbors. These Ukrainian Navy efforts created a gray zone and enabled the Grain from Ukraine Initiative, which ensures the export of Ukrainian grain to countries in need. In 2022, more than 24 million tons of agricultural products were exported from initially blocked Ukrainian ports.

He is obviously very proud of the accomplishments of their small navy. It is a good article, but I would have had to reference if for no other reason than to post the accompanying photo above.

“Ukraine’s Maritime Drone Strikes Again: Reports Indicate Attack On Novorossiysk” –Naval News

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Artist’s Impression of the Ukrainian Navy maritime drone attack on Novorossiysk, November 18 2022

Naval News reports,

It appears that a Ukrainian maritime drone, similar to those using in an attack on Sevastopol, has struck Novorossiysk. This would be strategically important, showing that more of the Russian Navy is under threat. Efforts may be underway to suppress this story in Russian media.

What might be missed in the report is that Novorossiysk, unlike Savastopol, is not in occupied Ukraine. It is in Russia. According to Wikipedia, “Novorossiysk is the biggest Russian seaport. In 2019 cargo turnover amounted to 142,5m tons. In 2021 cargo turnover amounted to 105,2m tons.”

It is too early to say that this is the start of a Ukrainian campaign against Russia’s oil and gas export industry, but it would be one way to apply additional leverage. If the Ukrainians are successful in their crowd funding drive to build 100 of these explosive Uncrewed Surface Vessels, they could make it very dangerous for Russia’s tankers and coastal energy infrastructure.