SOUNDINGS IN METRES	   
Reduced to NAP	   
Summer datum (April-Oct) lies between NAP and NAP-1dm	   
Winter datum (Nov-March) lies 3 dm below NAP	   
and may vary between NAP-2dm and NAP-4dm	   

HEIGHTS IN METRES	   
Above NAP	   

SUPPLEMENTARY MARKS
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.

The beacons mark at least the 1,7 metre depth contour (±April-October).

Outside the buoyage of the fairway called ‘VM’
all kinds of fishing gear may be encountered.

SPEED RESTRICTIONS
In these waters restrictions for sailing with fast
motorboats and waterskiing are in force.

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In severe winters buoyage is withdrawn.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.