A new water buoy found under Edit Town / World Editor / Landmarks. The nice thing about this, is that the water buoy can be placed in any game that has a sea front. It has an offset of +28 metres in the Y axis ( the default ocean height for Sunset Valley and my game ) so it should show at the correct height above sea level in the game. If not, then you'll have to use the water buoy available from CAW which is a complete different item. Use these to create a path for ships to be guided into your harbour.
You need Ambitions for the item to show in your game.
Water buoy (MediaFire)