JHD01-BNW bridge navigation watch alarm system (BNWAS) is designed according to the IMO MSC.128(75) and IEC-61162. Purpose is to monitor bridge activity and detect duty officer disability which could lead to marine accident. The system monitors the awareness of the officer of the watch (OOW) and automatically alerts to the Master or another qualified OOW if for any reason the OOW becomes incapable of performing OOW’S duties. This system’s structure is designed well, easy to operate, multi-interface, it is best selection for any kind of vessels.