What are the three modes of operation of BNWAS?

The system can be in one of three modes: ‘Manual OFF ‘- The system is turned off; ‘Manual ON’ – The system is on and functioning with a period of time ‘Inactivity time’; ‘Automatic’ – Automatic mode, the system automatically turns on when you turn on the autopilot and operates with a period of time ‘Inactivity time’.

How many stages are in BNWAS?

three alarm stages
The minimum requirement for a BNWAS under International Maritime Organization standards is to have a dormant stage and three alarm stages, except that on a non-passenger vessel, the second stage may be omitted.

When should BNWAS be operated?

The BNWAS should be operational whenever the ship’s heading or track control system is engaged, unless inhibited by the Master. 4.1. 2.1 Once operational, the alarm system should remain dormant for a period of between 3 and 12 min (Td).

How does BNWAS work?

Bridge Navigational Watch & Alarm System – BNWAS is a monitoring and Alarm system which notifies other navigational officers or master of the ship if the officer on watch (OOW) does not respond or he/she is incapable of performing the watch duties efficiently, which can lead to maritime accidents.

What are the components of BNWAS?

BNWAS Components

  • BNWAS Central Unit.
  • BNWAS RTA (Reset Button for outdoor use)
  • BNWAS ALBRA (Alarm Reset Box for outdoor use)
  • BNWAS ALR3 (Alleyway Alarm Box Stage3)
  • BNWAS RTI (Reset Button for internal use)
  • BNWAS ALR2 (Cabin Alarm Panel)
  • BNWAS RBI (Buzzer for internal use)
  • BNWAS PIR SENSOR (Infrared motion sensor)

Which power supply should the BNWAS be connected?

1021(26), implemented on 18 January 2010, the BNWAS first-stage audible alarm and the malfunction of, or power supply failure to, the BNWAS are classified as a mandatory alarm. The BNWAS should be connected to the VDR on ships whose keel is laid on or after 18 January 2010.

Why is BNWAS important?

BNWAS Overview The purpose of BNWAS (Bridge Navigational Watch Alarm System) is to monitor bridge activity and detect operator disability which could lead to marine accidents. BNWAS monitors the watch officer’s presence through watch safety system functions.

Who may exempt a ship from full compliance of the BNWAS?

Administrations
Administrations may exempt ships from the requirement when such ships will be taken permanently out ofservice within two years after the implementation date.

Why do ship needs BNWAS?

The purpose of BNWAS (Bridge Navigational Watch Alarm System) is to monitor bridge activity and detect operator disability which could lead to marine accidents.