This dataset includes the data used in in the HELCOM/OSPAR Ballast Water Exemptions Decision Support Tool. This tool was developed in 2013 based on the overall IMO framework, the 21 Baltic and North-East Atlantic coastal states and the EU. It allows user to define 'low risk' routes, as well as other necessary steps in granting exemptions under regulation A-4 of the IMO Ballast Water Management Convention (BWMC)

Citation: HELCOM/OSPAR Joint Ballast Water Exemptions Decision Support Tool: https://maps.helcom.fi/website/RA_tool/ HELCOM and OSPAR, 2020

Published: September 17, 2025 at 09:50

URL: http://ipt.vliz.be/eurobis/resource?r=helcom_ospar_netherlands_ports_water_sampling

Helsinki Commission
Helsinki Commission

OSPAR Commission for the Protection of the Marine Environment of the North-East Atlantic
OSPAR Commission for the Protection of the Marine Environment of the North-East Atlantic

Flanders Marine Institute (VLIZ)
Flanders Marine Institute (VLIZ)

1,456

occurrence records

1,585

measurements and facts

233

taxa

214

species

Taxa

Missing and invalid fields

Field	Missing	Invalid
coordinateUncertaintyInMeters	1,101		75.6%
maximumDepthInMeters	1,456		100.0%
minimumDepthInMeters	1,456		100.0%
scientificNameID		1	0.1%

Quality flags

The OBIS data quality flags are documented at https://github.com/iobis/obis-qc.

Flag	Records
NO_DEPTH	1,456	100.0%
ON_LAND	1,456	100.0%
NO_ACCEPTED_NAME	59	4.1%
MARINE_UNSURE	29	2.0%
NOT_MARINE	21	1.4%
NO_MATCH	1	0.1%

HELCOM/OSPAR Netherlands ports water sampling

Taxa

Missing and invalid fields

Quality flags

Measurement types

DNA derived data