Adding some caveats in response to some questions in the comments:

To resolve yes:

— the vessel length must exceed 100ft, so small patrol boats won’t count. I was intending ships, not small boats.

— for purposes of this market, ‘sink’ means the vessel is either a) completely submerged due to Houthi attack OR b) damaged beyond repair such that a third party sinks the vessel rather than tow it to safe harbor.