The smoke detection system is suitable for controlling cargo holds. The system uses the system’s pipe work through which air is continually sucked from the cargo hold. Fan motor units continue the suction of sampling air from a protected space. The smoke detection system is explosion protected. If any gas or smoke is detected, it gives a warning signal, indicating the source of the smoke which has been detected. For the remote indication of fire alarms and faults a repeater panel must be installed in the wheelhouse. This system has type approval certificates from IACS members.