Tidal range Tidal range Tidal range is the height difference between high tide and low tide. Tides are the rise and fall of sea levels caused by gravitational forces exerted by the Moon and Sun and the rotation of Earth. Tidal range is not constant but changes depending on the locations of the Moon and Sun. The most extreme tidal range occurs during spring tides, when the gravitational forces of both the Moon and Sun are aligned (syzygy), reinforcing each other in the same direction (new moon) or in opposite directions (full moon). During neap tides, when the Moon and Sun's gravitational
The Way to the Sea The Way to the Sea The Way to the Sea is a 1936 documentary film about the London to Portsmouth railway line (what is now known as the Portsmouth Direct Line) and its recent electrification. This is prefaced with an historical representation of Portsmouth and the London to Portsmouth road (known in the Roman era as Ermin Street and Stane Street). It was produced by the Strand Film Company. Its music was written by Benjamin Britten and its commentary by W. H. Auden, who also wrote the music and words respectively for the similarly themed "Night Mail" that year. The