A good environmental status is achieved if (1) the sound budget of the German Baltic Sea does not adversely affect the living conditions of the animals concerned. All human noise-producing activities must therefore not have a significant impact on the marine environment of the Baltic Sea. (2) The light input does not adversely affect marine life. (3) The emission of electromagnetic fields does not adversely affect migration or orientation of marine life. It is currently assumed that this will be achieved if, in the case of direct current, the measured values ​​on the sediment surface do not exceed the strength of the earth's magnetic field. (4) The rise in temperature does not have a negative impact on the marine environment. It is currently assumed that this will be achieved if the temperature increase does not exceed 2 K in 20 cm sediment depth. For a more differentiated representation of the good environmental status with regard to these energy inputs, further research is required with regard to both the inputs and the effects. Possible bases for describing a good status are sound measurements during construction measures in the sea and measurements of background noise (see Table 11 of the GES report Baltic Sea) Noise p. Indicator level Light inputs: The lighting of buildings necessary for the purpose of collision prevention can have a variety of effects on marine life. For migrating birds, this light entry can e.g. lead to evasive movements and ultimately have a barrier effect. On the other hand, birds fly to illuminated objects, especially at night and when visibility is poor, so that the attraction can lead to an increase in bird strike. Electromagnetic fields: During the operation of electrical lines, magnetic fields are generated and electrical fields are induced. Electric fields are induced when either the sea water or the animal swimming in it moves in relation to the magnetic field (BfS, 2005). Temperature entries: Depending on the type and type of cable, cables laid in the seabed can cause a significant increase in temperature in the sediment and in the soil pore water. The jacket temperature for power cables is a maximum of 70 ° C. The release of this temperature to the environment depends on the type of cable, its utilization, the current sediment temperature as well as the heat capacity and the thermal conductivity of the sediment (BfS, 2005).

The share of days and annual and regional levels of anthropogenic sound sources exceeding those likely to have a significant effect on marine animals

Good environmental status is achieved if the sound budget of the German Baltic Sea does not adversely affect the living conditions of the animals concerned. All human noise-producing activities must therefore not have a significant impact on the marine environment of the Baltic Sea. Sound measurements during construction work in the sea are the possible basis for describing good conditions (Table 11 of the GES report Baltic Sea). Temporary noise inputs in the form of impulsive signals should not cover any physical area Cause damage to marine organisms. According to the current state of knowledge, this means that a temporary hearing threshold shift (TTS) occurs at a SEL of 164 dB re 1microPa2s (unweighted) with an associated SPL of 199 dB (peak-peak) re 1microPa in porpoises. Perspectively, these sound entries must be viewed cumulatively in order to take account of multiple sound entries and different entry sources. Significant disturbance of marine fauna should be avoided, especially in protected areas and taking into account the occurrence of affected species and times sensitive to disturbances. There is currently no threshold for a significant disturbance for porpoises. On the basis of acoustic and visual investigations, it can be assumed, however, that pulse-like underwater sound leads to disturbances in the form of expulsions in the event of sound events from a SEL of 136 dB re 1microPa2s (BfN in development). This value was derived from observed displacement radii. Avoidance reactions of porpoises have been confirmed in playback experiments (Tougaard et al. 2011).

Amount of heat released into the sea

Good environmental status is achieved if the sound budget of the German Baltic Sea does not adversely affect the living conditions of the animals concerned. All human noise-producing activities must therefore not have a significant impact on the marine environment of the Baltic Sea. Measurements of background noise values ​​are possible basis for the description of a good condition (see Table 11 of the GES report North Sea). Natural sound sources such as wind and wave motion form the background sound in the sea. In addition to this natural "acoustic landscape" there are anthropogenic continuous sound inputs, mainly from shipping. In addition, temporary impulsive noise inputs, such as ramming work, temporarily increase the noise level in a marine area. On the basis of knowledge of background noise levels specific to the sea area due to continuous, in particular low-frequency broadband noise, it must be decided to what extent a reduction should take place in order to prevent adverse effects on marine organisms. For possible basics to describe a good condition see. Table 11 of the GES report Baltic Sea.