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Controlling Depths and Tidal Ranges and Surveys

Controlling Depth for Entry to the Harbour

The controlling depth is the level of the Littlehampton bar at 0.9 metres above chart datum.


Tidal Ranges

MHWS – 5.9m

MLWS – 0.4m

MHWN – 4.4m

MLWN – 1.7m

Spring range 5.5m / Neap range 2.7m


Rule of Thumb

Regardless of springs or neaps cycle 2½ hrs before HW until 3 hrs after HW there will be at least 3.4m on the tide gauge and so 2.5m over the bar.



For the lastest bathymetric survey of the Harbour entrance click here