DEPTHS IN HARBOURS
Depths in harbours and along quays are maintained by dredging. 
For the latest information consult the pilot.

SUBMARINE CABLES AND PIPELINES
Mariners are advised not to anchor or trawl in the vicinity of submarine cables and pipelines. 
Pipelines are not always buried and their presence may significantly reduce the charted depth. 
They may also span seabed undulations and cause fishing gear to become irrecoverably snagged, 
putting a vessel in severe danger.

VESSEL REPORTING
For details of the Noordzeekanaal Vessel Traffic Service see the Netherlands Coast Pilot (HP1) 
or Admiralty List of Radio Signals.

SOUNDINGS IN METRES
Reduced to canal datum (=NAP-4dm)
HEIGHTS IN METRES
Above canal datum (=NAP-4dm)