SOUNDINGS IN METRES
Depths reduced to IJsselmeer Winter Datum (=NAP -4dm)( Summer Datum (apr-oct) varies between NAP -1dm and NAP -3dm

HEIGHTS IN METRES
Above NAP

NOTES
- The beacons mark at least the 1,1 metre depth contour (summer datum) and are present from ± April-October. 
  More beacons can be met than charted. 
- Due to the wind-effect actual depth may differ from charted soundings locally. 
  A regular check of the water level from water level gauges is recommended.
- 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  In severe Winters buoyage is withdrawn.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.
- In these waters restrictions for sailing with fast motorboats and waterskiing are in force.
- In these waters supplementary marks for pleasure craft and special marks for areas meant 
  for waterskiing, kite surfing, jet-skiing and fast motorboats and areas under the Nature 
  Conservation Act are on station from ± April - October.

CENTRAL REPORTING POINT IJSSELMEER AREA: VHF 1 (IJSSELMEER, MARKERMEER, KETELMEER)
For all reports and information. Telephone: 0320-261111
(Safety and distress calls: VHF 16)

CAUTION
- Outside the buoyed fairways 'regels' (fishing stakes and traps) can be met with a length of max. 75 metres and about 250 metres apart.