No Russian warships in Black Sea for two days now

Russian Black Sea naval fleet shrinking but still dangerous: over 30 ships, including submarines, active – UA

Seven sailors killed, at least 27 others injured on sunken Russian patrol ship Sergei Kotov — HUR

Where did all the warships go? Russia’s Black Sea Fleet vanishes after sinking of Sergei Kotov

Sergei Kotov destruction stinging blow compelling change to Crimean supply routes – military analyst

Ukrainian intelligence publishes a conversation between Russians about Sergei Kotov sinking

Helicopter possibly present on destroyed Russian patrol ship Sergey Kotov — UA Navy

‘Twin’ of a ship involved in Zmiinyi Island assault. What is known about Sergei Kotov patrol ship

Drone attack sinks Russian warship, requiring over 10 ambulances as crew casualties mount – HUR

9 down, 4 to go – Ukraine’s navy sinks another major ship in Russia’s Black Sea Fleet – breaking