"The most vivid example is that in March there was a surprise inspection by order of the supreme commander-in-chief under the leadership of the commander-in-chief of the navy, a surprise inspection of the Pacific Fleet was held, during which the forces of anti-submarine aviation detected a US submarine in the designated areas," Pakhomov told Russian broadcaster Zvezda.
The submarine did not notice the escort because the aircraft used passive means of tracking, he added.