In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types of the Celtic Seas Marine Sub-region. The spatial extent of the potentially disturbed "abyssal zone" habitat is 107.6 km², i.e. 32.4% of the total habitat area in the Celtic Seas marine sub-region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterize the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of the potentially disturbed "coastal circalittoral coarse sediment" habitat is 2798.4 km², i.e. 94% of the total habitat area in the Celtic Sea Marine Sub-Region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of the potentially disturbed "coastal circalittoral heterogeneous sediment" habitat is 3.9 km², i.e. 31.6% of the total habitat area in the Celtic Sea marine sub-region. The areas and relative percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of the potentially disturbed "coastal circalittoral mud" habitat is 84.2 km², i.e. 96.3% of the total habitat area in the Celtic Sea Marine Sub-Region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity mainly responsible for the potential physical disturbance induced on the major benthic habitat types of the Celtic Sea marine sub-region. The spatial extent of the potentially disturbed "coastal circalittoral biogenic rocks and reefs" habitat is 565.7 km², i.e. 86.3% of the total habitat area in the Celtic Sea sub-region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of the potentially disturbed "coastal circalittoral sands" habitat is 294.4 km², i.e. 88.3% of the total habitat area in the Celtic Sea marine sub-region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of potentially disturbed "subtidal coarse sediment" habitat is 267.7 km², or 63.5% of the total habitat area in the Celtic Sea Marine Sub-region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by dragging fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of the potentially disturbed "heterogeneous subtidal sediment" habitat is 2.1 km², i.e. 5.1% of the total habitat area in the Celtic Sea Marine Sub-Region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity mainly responsible for the potential physical disturbance induced on the major benthic habitat types of the Celtic Sea marine sub-region. The spatial extent of the potentially disturbed "infralittoral mudflats" habitat is 56.2 km², i.e. 61.9% of the total habitat area in the Celtic Sea marine sub-region. The areas and relative percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of the potentially disturbed "subtidal biogenic rocks and reefs" habitat is 344.1 km², i.e. 54.7% of the total habitat area in the Celtic Sea Marine Sub-Region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of potentially disturbed "subtidal sands" habitat is 577.7 km², or 85.6% of the total habitat area in the Celtic Sea Marine Sub-region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterize the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types of the Celtic Sea Marine Sub-region. It has not been possible to fully distinguish rocks and reefs of the lower bathyal from sediments of the lower bathyal. Therefore, the two habitats are partially assessed together. The spatial extent of this potentially disturbed "lower bathyal sediments or rocks and reefs" habitat is 5 km², which represents 66.5% of the total habitat area in the Celtic Sea Marine Sub-region.The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, in particular due to the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional troll fishing is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types of the MC MCFN. The spatial extent of potentially disturbed "lower bathyal sediment" habitat is 351.7 km², or 65.9% of the total habitat area in the Celtic Sea Marine Sub-region. In addition, it was not possible to fully distinguish between Lower Bathyal Rocks and Reefs and Lower Bathyal Sediments. Therefore, the two habitats are partially assessed together. The spatial extent of this potentially disturbed "Lower Bathyal Sediment or Lower Bathyal Rocks and Reefs" habitat is 74.6 km², or 100% of the total habitat area in the Celtic Sea Marine Sub-region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterize the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The total spatial extent of the potentially disturbed "coarse circalittoral offshore sediment" habitat is 21,486 km², i.e. 99.8% of the total habitat area in the Celtic Sea Marine Sub-region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of the potentially disturbed "offshore circalittoral mixed sediment" habitat is 10.1 km², i.e. 100% of the total habitat area in the Celtic Sea Marine Sub-Region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of the potentially disturbed "offshore circalittoral mud" habitat is 131.8 km², i.e. 100% of the total habitat area in the Celtic Sea Marine Sub-Region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity most responsible for the potential physical disturbance induced on the major benthic habitat types in the Celtic Sea Marine Sub-region. The spatial extent of the potentially disturbed "Offshore circalittoral rock and biogenic reef" habitat is 122 km², i.e. 98.6% of the total habitat area in the Celtic Sea Marine Sub-Region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by troll fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity mainly responsible for the potential physical disturbance induced on the major benthic habitat types of the Celtic Sea marine sub-region. The total spatial extent of the potentially disturbed "offshore circalittoral sands" habitat is 12,761.8 km², i.e. 100% of the total habitat area in the Celtic Sea sub-region. The relative areas and percentages calculated for this assessment should nevertheless be put into perspective, particularly in view of the data and the method used to characterise the areas subject to physical disturbance induced by dragging fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity mainly responsible for the potential physical disturbance induced on the major benthic habitat types of the Celtic Sea marine sub-region. It was not possible to fully distinguish between rocks and reefs of the upper bathyal and sediments of the upper bathyal. Therefore, the two habitats are partially assessed together. The spatial extent of this potentially disturbed "Upper bathyal rock and biogenic reef" habitat is 74.6 km², i.e. 100 % of the total habitat area in the Celtic Sea sub-region, however, the relative areas and percentages calculated for this assessment should be put into perspective, in particular because of the data and the method used to characterise the areas subject to physical disturbance induced by trolling activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017), the D6C3 assessment must be carried out for each habitat type and the D6C3 results are not integrated. Furthermore, no threshold has been defined so far for the parameter "Extent": the status of the D6C3 criterion is therefore not reported. However, this assessment shows that professional trolling is the activity mainly responsible for the potential physical disturbance induced on the major benthic habitat types of the Celtic Sea marine sub-region. The spatial extent of the potentially disturbed "upper bathyal sediment" habitat is 1 961.5 km², i.e. 100% of the total habitat area in the Celtic Sea marine sub-region. In addition, it was not possible to fully distinguish between Upper Bathyal Rocks and Reefs and Upper Bathyal Sediments. Therefore, the two habitats are partially assessed together. The spatial extent of this potentially disturbed "Upper Bathyal Sediment or Upper Bathyal Rocks and Reefs" habitat is 74.6 km², i.e. 100% of the total habitat area in the Celtic Sea marine sub-region. The areas and relative percentages calculated for this assessment are nevertheless to be put into perspective, in particular because of the data and the method used to characterise the areas subject to physical disturbance induced by dragging fishing activities.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017) no threshold is to be specified for D6C2: the status of the D6C2 criterion is therefore not reported. However, the assessment of criterion D6C2 shows that the spatial extent of potential physical disturbance of the seabed is 42 700 km², which is more than 97% of the area of the Celtic Sea Marine Sub-Region. Although the use of available data on professional trolling increases the actual area under pressure, the assessment shows that almost 100% of the area of potential physical disturbance of the seabed is attributable to this activity.

In accordance with the advice given in Guidance 14 (Walmsley, S.F., Weiss, A., Claussen, U., Connor, D. 2017 Guidance for Assessments Under Article 8 of the Marine Strategy Framework Directive, Integration of assessment results. ABPmer Report No R.2733, produced for the European Commission, DG Environment, February 2017) no threshold is to be specified for D6C1: the status of the D6C1 criterion is therefore not reported. However, the assessment of the D6C1 criterion shows that the potential physical losses represent an area of 59.8 km², i.e. less than 0.2% of the surface area of the Celtic Marine Sub-Region. The potential physical losses are mainly due to marine works (material extraction, coastal works, dredging, dumping).