The problem is orca is about the size of yacht, and can literally sink it. Second, on yacht you can install only a toy harpoon, if you want sails, rudder, ding

The problem is orca is about the size of yacht, and can literally sink it. Second, on yacht you can install only a toy harpoon, if you want sails, rudder, dinghy, etc... The easy option would be something annoying. Like underwater ultrasound speaker. Better responder which will respond to their pings with sh*tload of garbage.