SOUNDINGS IN METRES
Dokkumer diep reduced to a water-level, maintained
as far as possible at 0.9 m below NAP.

HEIGHTS IN METRES
Dokkumer diep above a water-level, maintained
as far as possible at 0.9 m below NAP.

NOTES:
- Subsidiary channels are buoyed from 1/5 - 15/10.
- The beacons mark at least the 1.3 metre depth contour.
- Fishing areas are marked by floating beacons with yellow flags. These fishing areas
are not dangerous to shipping, keep clear of these areas outside the buoyed channels.