Use these options to create an ocean.
Turn this option on to attach the ocean to the camera. Attaching the ocean automatically scales and translates the ocean based on the camera, thus maintaining an optimum amount of detail for the given point of view.
Turn this option on to create a preview plane that shows a shaded patch of the ocean with displacement in shaded display mode. You can scale and translate it to preview different parts of the ocean. This plane is for preview only and will not render.
If you do not create this plane at the time you create the ocean, you can create the plane later by selecting the ocean plane and then selecting Fluid Effects > Ocean > Add Preview Plane.
Set how much you want to scale the preview plane in X and Z. The default is 10. Increase the size to see more detail, lower it for faster playback.