Hey ! This has happened to me a couple of times ! Both times on approximately 80 foot steel vessels about 30 nm offshore , roughly 200 fathoms of water . The first time it happened we were drifting in relatively calm water , felt like something lifted the bow of the boat slightly and set it down . The second time we were setting halibut gear at about 3 knots of speed and my first thought was that we blew our gearbox or had a major steering malfunction . The stern of the boat shifted somewhat violently to the side and there was some chattering coming from the steering flat . Both these instances came on suddenly and ended quickly . Other boats in the area reported similar things . Hope this helps ! <| sep |> Where are you and how many you need ? MTs just keep clogging my cargo