Here's what happens to Russian oligarch yachts after they're seized

[getagrip_already]

3. disable them? it will cost millions just to keep them from rotting in place......

These aren't warships where you can protect the metal and the engines and restart them later. They are closer to floating cities with their own hvac, power generation, sewage treatment, and atmosphere.

If they aren't maintained, mold will quickly make them uninhabitable. Systems that can't easily be accessed will rust in place. Electronics and electrical systems will quickly corrode and degrade.

These ships won't be worth much if they are just anchored and closed up for any length of time.