"anchor or a trawl is dragged across it" At this point this seems to be the most common cause of see cable damage. I guess the captains decide that it's worth

"anchor or a trawl is dragged across it" At this point this seems to be the most common cause of see cable damage. I guess the captains decide that it's worth dumping the anchor in a storm to protect the cargo even if the area "forbids" it.