Reasonable. Jag styr min båt. Jag styr på styrbord. I steer my boat. I steer on starboard. The Swedish styr is pretty much like the English steer but rounded

Reasonable. Jag styr min båt. Jag styr på styrbord. I steer my boat. I steer on starboard. The Swedish styr is pretty much like the English steer but rounded instead of flat, if that makes sense, and means the same. And bord can be a board. So, steering board.