A boat, some underwater explosive charges, underwater ROVs, and a team to operate all the above seems likely to be well within Ukraine's capabilities. The firs

A boat, some underwater explosive charges, underwater ROVs, and a team to operate all the above seems likely to be well within Ukraine's capabilities. The first underwater ROV I found via googling is $10K: https://www.deeptrekker.com/shop/products/dtg3# https://www.deeptrekker.com/shop/products/dtg3# It seems like something within the technical capabilities and resources of any functioning non-microstate.