The purpose of a bridge navigational watch alarm system
(BNWAS) is to monitor bridge activity and detect operator disability
which could lead to marine accidents. The system monitors the awareness
of the Officer of the Watch (OOW) and automatically alerts the Master
or another qualified OOW if for any reason the OOW becomes incapable
of performing the OOWs duties. This purpose is achieved by a series
of indications and alarms to alert first the OOW and, if he is not
responding, then to alert the Master or another qualified OOW. Additionally,
the BNWAS may provide the OOW with a means of calling for immediate
assistance if required. The BNWAS should be operational whenever the
ship's heading or track control system is engaged, unless inhibited
by the Master.