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The controlling depth is the level of the Littlehampton bar which extends 600 metres southwards from the end of the West Pier and is 0.9 metres above chart datum. The depth of water covering the bar can be calculated by subtracting 0.9 metres from the height of water indicated on the tide boards situated within the harbour.
Realtime tidal observations are also provided at the Arun Platform situated off Littlehampton beach and maintained by the Channel Coast Observatory.
Alternatively consult the Hydrographic Office’s on-line tidal prediction for Littlehampton at www.easytide.ukho.gov.uk and take account of the bar, your vessel draught and under-keel clearance when calculating your time of entry or departure.