The Russian Pacific Fleet has launched a series of anti-submarine warfare (ASW) drills in the Sea of Japan, according to a fleet spokesman.
Captain 1st Rank Roman Martov said two task forces comprising missile destroyers and diesel-powered submarines were taking part in the drills in line with a regular training programme, according to rianovosti.
The ASW drills will include a number of search-and-destroy missions, simulated torpedo attacks and live-fire drills with on-board artillery and air defence systems.
The Russian Pacific fleet's Udaloy I Class anti-submarine destroyers, Admiral Tributs and Admiral Vinogradov, will also participate in the exercises.
The final stage of the exercises will be a battle between the destroyers and submarines, with surface ships attempting to thwart a surprise attack from the deep, according to Martov.