Black Sea Fleet taking heavy losses against a country without a navy.

This has fairly significant strategic value too.

Ukraine has been able to export much needed grain to the Middle East and Africa as Russia has had to move its fleet assets away from Ukraine to avoid Ukrainian drones and missiles.

Russia as a result has not been able to maintain its blockade of Ukrainian ports. Ukraine has been able to have commercial ships hug its coast and that of NATO members.

The latest ship to be destroyed reportedly had Shahed drones on it, so it will also impair Russia's ability to attack Ukrainian civilians.