Undersea cables sabotage, CHI, RUS

An anchor-drag trace on the seabed shows that the electricity cable from Finland to Estonia was intentionally attacked.

If the only ship that was in a position to do it at that time and place was the Eagle S, it must have been that ship. Other ships must have been crossing the cable, but if they crossed it at other points they could not have been responsible for the sabotage.

It seem to me that countries must armor their undersea cables to make sabotage physically more difficult. The method needs to be cheap compared with the cable. Not being an expert, I can only speculate, Putting a meter or two of boulders over the cable might work, or maybe concrete blocks with holes to lift them by.