Chapter 1 General Outline of Equipment
1
Chapter 1 General Outline of Equipment
1.1 Functions
The system is a Bridge Navigational Watch Alarm System (BNWAS) consisting of a control unit, a
display unit, a buzzer units, and a reset devises. It is designed to prepare for any contingency in
which a duty officer is disabled to fulfill his duties due to a nap, health problem, or other reason.
Upon such an event, the system alerts other officers.
1.1.1 Purpose of the system
The purpose of the Bridge Navigational Watch Alarm System (BNWAS) is to monitor the motions
of the duty officer in the bridge and detect any his behavior disorder that may lead to a marine
accident.
To achieve the purpose, dormant period is set. If no reset operation is performed within the
dormant period, the system recognizes that the duty officer cannot fulfill his duties and outputs
an alarm in the bridge. If no response is given even after that, it alerts the captain or other
qualified officer for its situation.
1.1.2 Operation modes
BNWAS includes the following operation modes.
1） Auto Mode (Automatic mode)
While the ship's heading control system or the track control system is active, the
dormant period count down operates automatically. When their systems are not
activated, the countdown will not operate.
2） Manual On
The dormant period countdown operates continuously.
3） Manual Off
The dormant period countdown does not operate.
The Manual Off only stops the dormant period countdown. It operates the emergency
call, other call functions, the bridge alarm transfer function and BAM EMEGENCY
CALL transfer function.
Except in anchorage or in-bay navigation, operate the unit with “Manual On”.
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