## 3 Electrode Station Configuration
### General Remarks
It has the advantage of the non-overlapping frames, regarding suspension/approach capabilities, with respect to the dam, while having the same disadvantage as the third configuration (in terms of more complex station construction), due to the second row of frames at a distance from the dam. Fifth Electrode Station Configuration--Straight Frames in Two Successive Rows, Each Vertical to the Longitudinal Axis of the Dam and Aligned with Each Other  
The respective configuration of the electrode station is carried out according to Figure 9, where the straight frame has the characteristics of the basic configuration (\(N_{d\_frame}\) = 13, \(\ell_{p}\) = 0.50 m, \(\ell_{f}\) = 6.00 m). In the case of Korakia, the distance between the two rows (on the xOx\({}^{\prime}\)) is equal to s\({}_{c}\), taken here as equal to 9.0 m (against the estimated 8.53 m according to Table 10 in [2]); consequently, the total width according to Equation (36) will be 21.0 m. The distance between the frames (on the yOy\({}^{\prime}\) axis) is equal to \(d_{fp}\), which is taken here to be 11.0 m (against the estimated 10.9 m according to Table 10 in [2]) due to length availability; thus, the total necessary estimated length of the protective dam (behind which the arrangement will be placed), according to Equation (35), will be equal to 44.366 m. Accordingly, for the case of Stachtoroi, the distance between the two rows (on the xOx\({}^{\prime}\) axis) is equal to s\({}_{c}\), which is taken here as 6.0 m (against the estimated 5.788 m, according to Table 11 in [2]); consequently, the total width according to Equation (36) will be 18.0 m. The distance between the frames (on the yOy\({}^{\prime}\) axis) is equal to \(d_{fp}\), taken here as 8.0 m (against the estimated 7.951 m according to Table 11 in [2]) due to length availability. Therefore, the total necessary estimated length of the protective dam (behind which the arrangement will be placed) according to Equation (35) will be equal to 32.366 m. From the respective simulation, the results of Table 4 are obtained, with the corresponding parameters of Table 2. Indicatively, Figure 25 shows the electric field strength and the area of developing electric field strength greater than 1.25 V/m for the most unfavourable scenario, for the area of Korakia, with five frames operating (sixth frame out of operation, under maintenance conditions). From the study of the results for the region of Korakia, the following emerges:
* The deviation at the extremes of the array (along the yOy\({}^{/}\) axis) reaches up to 36.2 m, and along the xOx\({}^{/}\) axis up to 46.7 m (especially when five frames are loaded, except the 1 st, 2 nd, 5 th, or 6 th). However, in the area of the non-operating frame, the respective electric field strength is 3.3 V/m; therefore, no issues arise (regarding safety) when maintaining the frames, provided the diver has taken the appropriate measures. * The deviation in the maximum developing electric field strength of the electrode station compared to a single frame (26.29 V/m against 24.06 V/m, according to Table 10 in [2]) is of the order of 9.3%, slightly higher compared to the 1 st, 3 rd, and 4 th configurations (26.09 V/m according to Table 12 in [2], 26.12 V/m according to Table 2, and 24.14 V/m according to Table 3, respectively) and much higher compared to the 2 nd configuration (19.26 V/m according to Table 1). * In Figure 25b, regions between the electrode frames are shown, where the electric field strength decreases significantly below 1.25 V/m. However, this does not occur in the area of the frame that is set out of operation, although it does not exceed the value of 3.3 V/m. * The critical zone of the dam extends beyond it by 40.6 m (with a crest width of 5 m and a suspension distance of at least 1 m) along the xOx\({}^{/}\) axis (perpendicular to the dam), which is better than those in all previous configurations (1 st\(\rightarrow\)44.3 m, 2 nd\(\rightarrow\)42.7 m, 3 rd\(\rightarrow\)43.3 m, 4 th\(\rightarrow\)43.0 m).