Abstract: A subsea control unit is disclosed for a subsea control system. In an embodiment, the subsea control unit includes (a) a first interface for connecting to a subsea communication network, (b) a second interface for connecting to a subsea device, and (c) a processing unit adapted to process data received from the subsea device and generate control signals for the subsea device. The processing unit is further adapted to perform a master function. Further, a subsea control system is disclosed, including (a) a plurality of subsea control units, and (b) a subsea communication network. Each subsea control unit of the plurality of subsea control units is connected to a respective subsea device and to the subsea communication network. One of the subsea control units is configured to perform the master function. Yet further, a method of controlling a plurality of subsea devices and a corresponding computer program are disclosed.