Two Cargo Ships Under Attack in the Black Sea Return Russia to the Strategy of Maritime Strangulation of Ukraine

The most important aspect of the attack on the two ships in the Black Sea is not that Moscow has recorded two more struck targets. More importantly, by the beginning of September 2026, the Russian command is once again trying to make the very act of sailing to Ukrainian ports economically toxic. When the Russian Ministry of Defense announced on September 3 that it had struck a bulk carrier with ammunition and a container ship with military equipment, it addressed its message not only to Kyiv but also to insurers, shipowners, and grain traders. In Soviet and post-Soviet military logic, this is a classic method of indirect pressure: to strike not at the front as such, but at the war supply system and at the nerves of the market (Report.az, September 3; Reuters, September 2).

Why the Sea Has Again Become the Main Lever

After the failure of the idea of a Black Sea truce, Russia has effectively returned to a strategy of selective maritime strangulation of Ukraine. In mid-August, Reuters reported that Moscow rejected a proposal to cease strikes on civilian shipping in the Black Sea, and on August 24, Volodymyr Zelensky publicly acknowledged that Russia was "not ready" for such a scheme (Reuters, August 14 and 24). This was an important moment: if the diplomatic channel does not yield political concessions to Russia, the Kremlin almost automatically raises the price of transit. As a result, the port, the ship, the elevator, the railway approach, and the insurance policy begin to be viewed as a single operational target.

That is why the recent strikes cannot be read as an isolated episode. As early as August 31, Reuters reported that Russian grain exports had already begun to partially shift to the Baltic direction due to increasing instability in the Black Sea. This means that Moscow is adapting to its own theater of risk better than its opponent and is simultaneously trying to impose an asymmetric price of war on Ukraine. In other words, Russia cannot reliably close the sea physically, but it seeks to close it commercially.

What is Changing in Russian Military Logic

Here we see a shift characteristic of the late Russian campaign of 2025-2026. Previously, the main symbols of pressure were missiles targeting the power grid and ports in the Odesa region. Now, systematic influence on the behavior of private carriers is added to this. Reuters noted on September 2 that ships in the Black Sea are already setting up improvised anti-drone defenses. This fact alone is almost more important than any single hit. If the civilian fleet begins to operate in a mode of frontline improvisation, it means that Russia is achieving not so much the destruction of tonnage as the destruction of predictability. And for trade, predictability is more valuable than metal.

This also has a distinct Soviet hue. Moscow traditionally prefers operations where the military effect is amplified by political-psychological noise. A strike on a ship with cargo can be presented as a blow to the supply of the Armed Forces of Ukraine, but the real additional effect arises when, after this news, insurance premiums rise, routes change, and traders postpone contracts. This is no longer just firepower; it is the management of expectations of the enemy and neutral market participants.

For the Kremlin, the ideal maritime operation today is one after which the Ukrainian port is formally open but begins to operate commercially as semi-closed.

Why Ukraine Responds with Strikes on Energy and Service Vessels

Kyiv, however, thinks in the same bundle of "sea, energy, logistics." The strike by a Ukrainian naval drone on the vessel Nefrit near Sochi on September 4 was significant not because of the size of the target but because of its function. According to Bloomberg as reported by gCaptain, this vessel was involved in work around the infrastructure of the Caspian Pipeline Consortium, critically important for the export of Kazakh oil through the Russian coast of the Black Sea (gCaptain, September 4). In other words, Ukraine is showing that if Russia links Ukrainian shipping to military logistics, then Kyiv is ready to link Russian port and energy infrastructure to the financing of the war. This is no longer a full-fledged struggle for the water area but for the cost of using the water area.

Hence the new level of mutual risk. The New Arab, citing analysts and Ukrainian assessments, reported that in July alone, Russia carried out dozens of strikes on port infrastructure, civilian vessels, and maritime corridor facilities, while grain exports fell significantly below potential capacity by the end of August (The New Arab, September 2). When both sides begin to systematically attack logistics, the sea ceases to be just a supply route. It becomes a lever of coercion, comparable in significance to strikes on oil refining or railway hubs.

What This Will Lead to in Autumn 2026

In the autumn, Russia will likely continue to combine strikes on ships, ports, and adjacent infrastructure with diplomatic signals about an allegedly remaining chance for negotiations. This is a typical Russian scheme: first, worsen the actual conditions, then offer their partial "stabilization" as a bargaining chip. For Ukraine, the danger lies not only in physical damage but also in the gradual erosion of commercial trust in the maritime corridor. If some shipping companies decide that entering Ukrainian ports has become too expensive even without a formal blockade, Moscow will achieve exactly the result it seeks without legally declaring a blockade.

But this strategy has its limits. It works as long as the damage to Ukraine is greater than the accompanying losses for Russian export routes linked to Novorossiysk, Sochi, and Black Sea energy. The more actively Kyiv strikes such targets, the less one-sided the coercion becomes. The Russian maritime campaign in the Black Sea may still yield tactical dividends for the Kremlin, but strategically it increasingly resembles a game of exhausting the commercial resilience of the region. Russia is capable of making the sea more expensive. Making it safe again is something it can no longer do.