August 30, 2026: Both Ukraine and Russia border the black Sea, and both export grain. Russia exports 50 million tons a year while Ukraine sells 42 million tons. All Ukrainian exports and most Russian exports travel through the Black Sea. Recent Ukrainian and Russian combat operations in the Black Sea have blocked those exports. That means about seven million tons of grain are not reaching the world each month as long as this continues.

Recently, it has been Ukrainian drones sinking or damaging over fifty Russian ships, most of them hauling grain. Russian threats against Ukrainian shipping have kept Ukrainian grain transports in various ports or waiting in the Mediterranean Sea until the situation improves. Meanwhile, Ukrainian aerial and naval drones prevent the Russian Black Sea Fleet from intervening in the battle for control of the Black Sea.

To put the grain export situation in perspective, nearly 600 million tons of grain are exported each year. Russia and Ukraine account for a quarter of that. The rest come from the Americas, Europe, Central Asia, and Australia. While the United States and Canada account for nearly a third of world wheat exports, Russia accounts for 10 percent and Ukraine for 4.4 percent. Each year, about 2,300 ships enter the Black Sea to load 64 million tons of grain for export. That’s eleven percent of the world's grain exports.

When Russia invaded Ukraine in 2022, its Black Sea fleet dominated the Black Sea and threatened Ukrainian grain exports, which accounted for 41 percent of its export income. The Russian Black Sea Fleet sought to block those exports. Most of these grain products went to Egypt, Indonesia, Turkey, Pakistan, and Bangladesh. These countries switched to other suppliers, but food imports cost more because, with Ukrainian grain off the market, shortages rose and prices climbed, making it more costly for nations dependent on Ukrainian grain to feed their populations.

Ukraine needed to deal with the Black Sea Fleet quickly. The initial problem was that Ukraine lacked a large navy. They had some patrol boats, which were a nuisance but not an obstacle to Russia's continued control of the Black Sea.

Ukraine did have something of a secret weapon: naval drones, especially the Magura. About a hundred of these drones defeated the Black Sea fleet. When the war started, the Magura V5 was just a concept, a preliminary design for a one-ton, 5.5-meter-long naval drone. Magura initially used a fishing boat with a solid waterproof cover, plus batteries for propulsion. There were sensors and a compartment for 300 kg of explosives or weapons. These included a machine gun protruding above the drone's top and two Sidewinder anti-aircraft missiles in launch tubes, ready to be fired at Russian aircraft or helicopters. Magura had many electronic components, including several day/night video cameras that gave the remote operator a view of the area around the drone. It also had an autopilot, so the remote operators did not have to personally maneuver the drone over long stretches of open water. Most Magura missions were one-way, but those equipped with machine guns and surface-to-air missiles were used to attack Russian aircraft. One Magura V7 used those two missiles to shoot down two Russian SU-30 jet fighters. This was the first time a naval drone had shot down warplanes. Earlier, a Magura had used Ukrainian R-73 heat-seeking missiles to take down one Mi-8 helicopter and damage another.

In 2025, Ukraine introduced the Magura V7, which weighs about 1.2 tons and can carry 650 kg of weapons. Its operational range is a thousand kilometers. The V7 can also be equipped with an electricity generator, enabling it to stay at sea for up to seven days. This model can move at speeds of up to 72 kilometers an hour. Cruising speed is 43 kilometers an hour.

The Ukrainian experience using naval drones to defeat the Russian Black Sea Fleet was unique. Ukraine had only surface-to-ship missiles when the war started, but eventually shifted to three new naval drones, Sea Baby, Mother, and MAGURA, or Maritime Autonomous Guard Unmanned Robotic Apparatus.

Some of these naval drones were used for a mid-2023 Kerch Bridge attack. One of the drones carried 850 kg of explosives and inflicted enough damage to halt use of the bridge. The Mother drone carried 450 kg, and MAGURA carried 320 kg. In addition to attacking targets, these drones can also be used for reconnaissance and surveillance using video cameras that broadcast what they see back to the drone operator. Some drones have been armed with small rocket launchers. The Mother drone has a range of over 700 kilometers and can operate on the high seas. Endurance is about 60 hours, and top speed is over 70 kilometers an hour. Mother was used for an attack on the Russian naval base at Novorossiysk, which is a thousand kilometers from Crimea.

Ukraine has been developing subsurface drones and, in early 2023, introduced the first one, the Toloka2 TK-150. This drone was 2.5 meters long and equipped with a sensor mast that remained above the surface for navigation and target identification. Toloka2 can also carry a small explosive warhead. Later, Ukraine developed the larger Marichka drone that is six meters long and one meter in diameter. Ukraine plans for a Western manufacturer to build and weaponize Ukrainian drones.

Ukrainian drones have been quite successful in attacking and sinking or disabling Russian navy ships. So far, over a dozen attacks have sunk or damaged about twenty ships.

Ukrainian drone operations in the Black Sea forced the Russian Black Sea Fleet to withdraw to the eastern shore of the Black Sea. Sevastopol was no longer a safe place to be, and Russian ships could no longer launch their Kalibr cruise missiles without risking attack by Ukrainian drones. The presence and aggressive use of the drones meant that Ukraine’s grain corridor was kept open despite Russia’s threats to interfere. Beyond symbolic significance, the corridor holds critical economic importance for Ukraine and is expected to contribute up to seven percent to GDP growth in 2024 because of the grain shipments.

Russian countermeasures to Ukrainian naval drones included using aircraft and helicopters to destroy slow-moving drones before they attack and expanding use of jamming to disrupt drone control signals. These changes made it much more difficult for Ukrainian naval drones to reach and destroy targets. But by 2025 the Russians had already lost control of the Black Sea and were not getting it back.

This left Russian warships dependent for maintenance and fuel on bases in the north, near the land border with Norway, and in the Far East, near Japanese and South Korean naval bases. In a post-Cold War development, the Japanese and South Korean fleets are now far larger than the Russian Far East fleet. Before the 1990s, the South Korean fleet was largely non-existent and the Japanese fleet tiny and purely defensive. Chinese naval power began to emerge by the late 1990s but took another decade to become a significant force. Then, as now, the American Western Pacific Fleet was a major naval power in the region.

The lessons learned by American, Chinese, Taiwanese, Ukrainian, and Russian naval commanders are that these drones have changed the rules for naval warfare. If China tries to invade Taiwan, they have to prepare countermeasures for numerous naval drones blocking the way. Everyone continues to observe Black Sea operations for details on what new tactics, techniques, and drone designs appear. The U.S. has an edge because they are a major supporter of Ukraine and is seeking to make the most of its insider knowledge of the Ukrainian naval drone effort.