A coastal water body is a discrete and significant element of surface water located between the baseline from which to measure the breadth of territorial waters to a distance of one nautical mile. Correspondence reporting of the WFD (Water Framework Directive) : This entity corresponds to the concept of Coastal Water Body (CWBODY) of WISE.

A transitional water mass is a discrete and significant element of surface water located near the mouths of rivers or streams, which are partly saline because of their proximity to coastal waters but which are substantially influenced by freshwater currents, constituting the elemental aquatic boundaries destined for the evaluational unit of the DCE. Correspondence DCE reporting: This entity corresponds to the concept of Transitional Water Body (TWBODY) of the WISE.