With the rapid development of the shipping industry, the number of ships berthing at ports is also growing rapidly, and the emission problems it brings have made the environmental situation around ports increasingly unfavorable. Society's concerns about port air quality have put increasing pressure on ships and port operators to reduce the release of harmful gases.

During the berthing period of the ship, the main use of auxiliary generators is to meet the ship's electricity demand. The use of the ship's own auxiliary generators requires burning heavy oil or diesel. While consuming fuel to obtain power, the ship produces pollutant emissions. Polluting gases emitted into the atmosphere mainly consist of nitrogen oxides (NOX), sulfur oxides (SOX), volatile organic compounds (VOC), and particulate pollutants (PM). Therefore, in order to meet the electricity demand of ships during berthing while minimizing pollutant emissions, it is necessary to find alternative sources of electricity for ship internal combustion units.

Providing electricity from the shore to the side of the ship is not a new application. As early as the modernization of the shipbuilding industry, ships had already been using external power sources in shipyards. By extending the use of external power sources from shipyard parking to port parking, it is possible to stop the operation of auxiliary engines during port parking and thus stop the emission of exhaust gases from the ship. The implementation of shore power supply for berthing vessels in the port area is a development direction for green port construction, which is undoubtedly of great significance for protecting the environment of the port area and nearby urban areas. At the same time, the shutdown of auxiliary generators on the ship reduces vibration and noise, improves the quality of the crew's living and working environment, and provides convenient conditions for equipment maintenance during docking, which also has a positive effect on the ship.

In applications where external power is supplied from the shore side to the ship side, the cable is the carrier channel for transmitting the power and therefore a safe and effective connection of the power cable between the shore side and the ship side needs to be established. The shore power cable and the cable reel are called cable management system (device). The process solutions and features of the cable management system are different for different terminals, different ship types and different sizes of ships, but the starting point of these solutions is based on safety and high efficiency.