amplitude congestion direct tide ebb ebb and flow ebb tide flood flow flux flux and reflux full full tide fullness high tide high water impletion low tide low water lunar tide neap neap tide opposite tide overfullness plenitude plethora refluence reflux repletion rip riptide satiety saturation saturation point solar tide spring tide surfeit thalassometer tidal amplitude tidal current tidal current chart tidal flow tidal range tide tide chart tide gate tide gauge tide race tide rip tidewater tideway