CENTRAL REPORTING POINT WADDENZEE For all reports and information. Telephone: +31 (0)88 79 74 599 VHF 4 (Safety and distress calls : VHF 16) CHANGING FAIRWAYS Due to strong currents the fairways are changing continuously. Actual depth may differ from the charted soundings. The buoyage is adjusted accordingly. For least depths on bars etc. see 'Dieptestaat', incorporated in Netherlands N.t.M. TIDAL STREAMS Attention is drawn to the strong tidal streams in these waters. For tidal streams and tidal information see HP 33 Tidal heights and streams for coastal waters of the Netherlands and adjacent waters and HP 33D-NLTides published by the Netherlands Hydrographer. WINTER-BUOYAGE From ± December-March buoyage may be replaced by winter-buoyage. In severe winters buoyage is withdrawn. Buoyage will be replaced in order of importance. In spring it is possible that not all channels are already buoyed as charted. CABLES AND PIPELINES Mariners are advised not to anchor or trawl in the vicinity of cables and pipelines. Pipelines are not always buried and their presence may effectively reduce the charted depth by up to 2 metres. They may also span seabed undulations and cause fishing gear to become irrecoverably snagged, putting a vessel in severe danger. Outside the fairways cables and pipelines are marked by steel pipes with an elevation of 4dm above the sea floor. See the Netherlands Coast Pilot (HP 1) for more information. RJ CLEVERINGSLUIZEN Red lights are shown during sluicing.