Ukraine has relied on this innovative tactic to wreak havoc on Russia's Black Sea fleet, damaging or destroying a number of warships.

The footage showed a naval drone approaching the mock target in the middle at a perpendicular angle and impacting the structure, causing a massive blast.

The footage showed a naval drone approaching the mock target in the middle at a perpendicular angle and impacting the structure, causing a massive blast. The defense ministry said the exercise ...