This system allows communication between a main station (SWITCHBOARDS) and other remote stations (SUBSTATIONS) located in different parts of the vessel. From the main station, it is possible to select, call and communicate to one, several or all substations and from any of the substations to the main station.
The system allows a maximum of 20 substations, all of them adapted to the different locations in the vessel depending on the conditions such as high noisy areas, outside decks, etc.