## 4 Platform Application  
### e-Navigation Development Platform  
In the process of system development, the maritime security data security platform has formed a set of platform frameworks based on J2 EE system development, which follows the e-Navigation specifications, and accumulated many reusable common system components and formed a series of service engines based on the concept of SOA. Finally, intelligent, visual and modular development has been completed for the user authority, organization, workflow, report form, file management, user interface and other aspects. The e-Navigation development platform supports all workflow models and provides a visual process modelling environment [39]. The platform provides common modules, service engines, system components and custom systems, which can greatly accelerate the development of the server and shorten the system development cycle. At the same time, this platform can improve the standard and consistency of the system construction. What is more, it benefits from the expansion and upgrade of the e-Navigation pilot project in the future. Figure 4 is an e-Navigation development platform. \begin{table}
\begin{tabular}{l l l l} \hline \hline  & \multicolumn{3}{c}{**Component**} \\ \hline  & \multicolumn{1}{c}{**Ship**} & \multicolumn{1}{c}{**Shore**} & \multicolumn{1}{c}{**Surface and Underwater**} \\ \hline \multirow{3}{*}{Network Hardware} & WIFI & \begin{tabular}{l} Cloud Server \\ TCP \\ \end{tabular} & \begin{tabular}{l} 3G/4G/5G \\ GNSS \\ \end{tabular} \\  & AIS & \begin{tabular}{l} Storage Device \\ Security Device \\ Power Unit \\ \end{tabular} & \begin{tabular}{l} The solar panels \\ \end{tabular} \\ \hline Platform & \begin{tabular}{l} ECDIS \\ VDES \\ \end{tabular} & \begin{tabular}{l} Observation Station \\ Satellite \\ \end{tabular} & \begin{tabular}{l} Buoy \\ USVs \\ \end{tabular} \\ \hline \multirow{3}{*}{Sensor} & \begin{tabular}{l} Atmospheric \\ Radar \\ Camera \\ Sonar \\ \end{tabular} & \
\begin{tabular}{l} Atmospheric \\ Radar \\ Camera \\ Camera \\ Camera \\ Camera \\ Camera \\ \end{tabular} &
\begin{tabular}{l} Atmospheric \\ Radar \\ IMU \\ MEMS \\ \end{tabular} \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Hardware component. Figure 4: E-Navigation development platform. ### e-Navigation Development Platform  
The maritime data security management platform can be used as the basic framework for developing ship and shore-based e-Navigation systems. In 2016, the Tianjin port e-Navigation integrated information management system was developed and has been running stably until now. The system interface is shown in Figure 5. The system realizes visualization and modular design of maritime data and develops a data management system, as shown in Figure 6. Among them, Figure 6a shows the data resource management, Figure 6b shows the data acquisition management, Figure 6c shows the data conversion management and Figure 6d shows the data fusion management. At the same time, the system provides users with information services such as ships, waterways, hydrometeorology and multifunctional buoys [40], as shown in Figure 7. More specifically, Figure 7a shows the data dictionary maintenance, Figure 7b shows the release mode management, Figure 7c shows the published data definition and Figure 7d shows the service publication status. Subsequently, the Pearl River Estuary e-Navigation application system was developed, which can carry out route planning, intelligent navigation and chart plotting, as shown in Figure 8.  
Based on developments in recent years, the Maritime Silk Road Transport environmental security service system was developed in 2021. The system also uses the technical architecture of the maritime data security management platform and realizes the visualization of various marine data on 2D and 3D integrated maps.