So this category of weapon is called a Close In Weapon System. Moskva had 6 of these, the main russian CIWS: https://en.wikipedia.org/wiki/AK-630 https://en.wi

So this category of weapon is called a Close In Weapon System. Moskva had 6 of these, the main russian CIWS: https://en.wikipedia.org/wiki/AK-630 https://en.wikipedia.org/wiki/AK-630 It also had 40 short range surface to air missiles. No one knows the exact details of the strike, but it's been suggested that Ukraine used a drone as a diversion. Another speculation is that in photos of the ship after the attack, the main search radar is in the downward, stowed position. This may suggest it wasn't on at the time of the strike, or it may have been moved as part of damage control. All that said, incompetence has been a consistent theme with the Russian military in this war, and in particular with their black sea fleet. Ukraine has had repeated success attacking with small unmanned surface craft, basically Ski-Doo style boats they've modified for remote piloting using a thermal camera and Viasat, and with a bunch of explosives. There's video footage from these attacks on twitter and such, and while it's very unclear, in some of them it appears there's no watch standing on the ship being attacked, or they're shooting at it using small arms rather than the CIWS. None of this is definitive, but it is all consistent with poor training, apathy, and incompetence on the part of the crews.