# O2O: An Underwater VLC Approach in Baltic and North Sea
## 5 Numerical Results
The quarterly outage performance of the proposed system model under strong channel conditions following GG distribution in mingled water has been depicted in Figure 8 by utilizing the investigated closed-form expression in (21). The superior outage performance is observed in February while the average performance is in May. The system performance in mingled water is obtained as poorest in August. However, the performance in November is quite near to the average performance for the year. The comparative performance is obtained in Figure 8, within the different duration of the corresponding year. Due to this, the \(\alpha\) and \(\beta\) particles have been calculated differently. The average year performance is depicted based on average temperature and salinity for each ocean as (\(T_{N}=9.7\)\({}^{\circ}\)C and \(S_{N}=4.88\) PSU) and (\(T_{B}=8.62\)\({}^{\circ}\)C and \(S_{B}=27.42\) PSU), respectively. Furthermore, the outage probability performance deteriorates as the atmospheric turbulence conditions become severe. The threshold SNR (\(\gamma_{th}=5\) dB) is used to achieve the outage performance of the system. The outage performance is more significant of the proposed system model in the North ocean, due to varying vertical depth using (20) as depicted by Figure 9. The large and small scale \(\alpha_{NB}\), \(\beta_{NB}\) parameters are calculated as per the temperature and salinity conditions of the oceans, while the attenuation coefficient has deterministic values as discussed in section III. In the North ocean, the best outage performance is observed at 15 m in high SNR conditions (47.5 dB) rather than the limiting vertical distance at 50 m. If targeting \(10^{-4}\), at 20 m and 25 m, the performance can be achieved at 41 dB and 48 dB SNR values, respectively. This is because of the decreasing temperature and increasing salinity, pressure, and density. It means that by increasing the vertical distance underwater, the performance of the system is simultaneously reduced. Similarly, In Baltic sea observation of outage performance is obtained by Figure 10 on varying vertical distances by unitizing expression as (20). The superior performance in the Baltic sea could be depicted at 15 m, for SNR channel conditions at 39 dB. If targeting  
Figure 6: The observation of outage performance for whole year depicted in North Sea. The simulated outage performance included as in February. The outage performance is simulated based on the experimental data provided though the year. outage performance \(10^{-4}\) at 20 m, it is achieved at 36 dB in the Baltic sea. Still, the poorest performance can be observed in both of the oceans at the maximum vertical distance at 50 m. As compared with the North ocean the superior performance is obtained in the Baltic ocean in low SNR conditions as 15 m and 20 m, respectively. Figure 8: The outage performance of the system is depicted at the particular vertical distance of the communication setup in North ocean. The highest and minimum outage performances are depicted on different water conditions. Figure 7: The observation of outage performance for whole year depicted in Baltic Sea. The simulated outage performance included as in February. The outage performance is simulated based on the experimental data provided though the year. Figure 10: The outage performance of the system is depicted at the particular vertical distance of the communication setup in Baltic ocean. The highest and minimum outage performances are depicted in different water conditions. Figure 3:0 The outage performance of the system is depicted at the particular vertical distance of the communication setup in North ocean. The highest and minimum outage performances are depicted in different water conditions. The outage performance of the whole system within the both of oceans could be observed in Figure 11 using closed form expression as (21). The results are obtained when the experimental setup is situated on varying vertical distances underwater.