DEPTHS AND AIDS TO NAVIGATION
The channels depths are liable to frequent change and the buoys are moved accordingly. 
Charted details cannot always be relied on.

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

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

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.

PORT SIGNPOSTING SYSTEM
Berth numbers e.g. 6001-6105 relate to the Port Signposting system. 
These numbers correspond to the numbering of the waterfront. 
The port numbers are indicated in black figures on yellow boards.