Admiralty Tide Tables - United Kingdom and IrelandExcluding Isles of Scilly, English Channel to River Humber,Channel Islands and European Channel Ports.Worldwide tidal height information, revised annually for greater accuracy, makes it easier to plan your departaure and arrival times.The tables include daily high and low-water times and heights for standard ports, times and height differences for secondary ports and harmonic constants for all ports where they are known.