Russia is protecting occupied Crimea better than its oil refineries. Moscow is constantly boosting air defense systems in the peninsula with the most advanced systems in response to Ukraine’s strikes, says Ukrainian Navy Spokesperson Captain 3rd Rank Dmytro Pletenchuk, Espreso reports. 

Meanwhile, Russian oil remains a key source of revenue that funds its military aggression against Ukraine. In 2025, profits from the oil and gas sector account for about 77.7% of Russia’s federal budget. 

Russia deploys S-500 “Prometey”, but fails against Ukrainian attacks

“All the air defense systems they have were already deployed there. They’ve concentrated the S-500 ‘Prometey’ in Crimea for a long time,” Pletenchuk says.

The S-500 is Russia’s newest generation air defense system, designed to intercept ballistic and cruise missiles, strategic aircraft, and hypersonic missiles. It can detect targets up to 800 km away and strike them at a range of 600 km, as per Defence Blog. 

Equipped with advanced electronic warfare capabilities, it can operate independently or integrate with S-400 systems, each valued at approximately $600 million.

Despite these defenses, Ukrainian forces destroyed an S-500 complex in Donbas this summer with ATACMS missiles, according to the Tivaz artillery division.

Crimea remains strategic for Russia

Pletenchuk notes that Crimea continues to be a critical location for Russia.

“The Russians will cling to the peninsula until the very end. They are strengthening Crimea’s air defenses far more than their own oil refineries,” he said.

Despite the saturation of air defenses, Ukraine continues to strike Russian military assets in Crimea.

“Our Armed Forces are still able to target key enemy resources. For Russia, the oil industry is particularly important because it funds their operations and contributes to their budget,” Pletenchuk adds.

Key targets of the last few months

In August, Ukraine’s Defense Intelligence reported that it destroyed several high-value Russian targets in Crimea, including:

• UTIOS-T radar system
• RT-70 radio telescope, a unique Soviet-era facility for monitoring satellite constellations
• GLONASS satellite navigation system dome
• Coastal radar station MR-10M1 ‘Mys’ M1
• 96L6-AP radar of the S-400 missile system

The most interesting of them is the radio telescope. It was built during Soviet times to monitor satellite constellations. Pletenchuk emphasized that “it was genuinely one-of-a-kind.”