Dredging

Dredging is the removal or relocation of seabed, riverbed or harbour sediment to create, restore or maintain navigable depth. In a boating context it is carried out in channels, marinas, entrances and alongside berths so vessels can pass or moor without touching bottom at normal operating draughts.

For skippers, dredging affects under-keel clearance, buoyage, temporary exclusion zones and the reliability of charted depths. Freshly dredged channels may be deeper, but spoil banks, suspended sediment and moving plant can create hazards. Always compare your vessel’s Draught with local Chart Datum and expected Tidal Current before committing to a shallow approach.

Harbour notices, chart updates and marina advice are essential because dredging areas can change faster than published charts. PredictWind forecasts, tidal information and routing tools help you time arrivals for favourable water levels, visibility and sea state, especially where works narrow a fairway or reduce manoeuvring room.