The BNWAS is designed to alert the crew if the watch officer becomes incapacitated, ensuring the vessel remains under control. Regular testing of BNWAS ensures its reliability in emergencies. Service involves testing the sensors, checking alarm functionality, and verifying system responses. The BNWAS system is crucial for preventing accidents caused by human error, especially during long shifts or adverse conditions. Maintaining the BNWAS system ensures compliance with SOLAS regulations and helps protect both the vessel and crew by ensuring that the watch system remains effective at all times.