What is the meaning of BNWAS and what is its purpose?
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.
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).
What is the principle of BNWAS?
A Bridge Navigational Watch Alarm System, abbreviated BNWAS, is an automatic system which sounds an alarm if the watch officer on the bridge of a ship falls asleep, becomes otherwise incapacitated, or is absent for too long a time. The BNWAS is automatically engaged when the ship’s autopilot is activated.
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’.
Why do we need 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. BNWAS monitors the watch officer’s presence through watch safety system functions.
What is the use of BNWAS?
The primary function of the BNWAS is to monitor the officer of the watch and detect incapacity that would prevent normal watchkeeping duties being performed. This can include situations such as, a lone watchkeeper falling asleep or suffering illness such as a heart attack.
How many reset box of BNWAS must be installed on a vessel?
one reset device
Guidelines for BNWAS installation (i) At least one reset device should be provided near each conning position in thewheelhouse. More reset devices may be provided to the workstations for navigation, manoeuveringand monitoring in order for safe and effective operation, if desired.
What are the important function of the BNWAS?
Who is responsible for the maintenance of the ship?
International Safety Management Code (ISM) specifies the rules and regulations for maintenance management that influence the shipping industry. The ISM Code stipulates that each ship operator is responsible for the ship’s safe and pollution-free operation.
Why is Bnwas important on modern ships?
The new resolution passed by IMO focuses on the importance of using BNWAS – Bridge Navigational Watch and Alarm system to prevent accidents as a result of watch keeping flaws. …
How many reset box of Bnwas must be installed on a vessel?
What is the meaning of Ecdis?
Electronic Chart Display and Information System
One technology that has the potential to make a huge difference to maritime safety is the Electronic Chart Display and Information System (ECDIS), a digital navigation system that replaces paper-based nautical charting processes by overlaying positioning information from global positioning system (GPS), radar and …
When does The BNWAS need to be in operation?
4 From the operational point of view, automatic interface with activation of the ship’s heading or track control system (HCS/TCS) is a superfluous function because SOLAS regulation V/19.2.2.3 requires the BNWAS to be in operation whenever the ship is under way at sea.
What are the standards for a BNWAS vessel?
BNWAS performance standards are specified in IMO Resolution MSC.128 (75). The timetable for fitting the equipment is shown below and applies regardless of whether or not the vessel is engaged on international voyages:
Which is IMO Resolution specifies performance standards for BNWAS?
BNWAS performance standards are specified in IMO Resolution MSC.128 (75). The timetable for fitting the equipment is shown below and applies regardless of whether or not the vessel is engaged on international voyages: Cargo ships of 150 gross tonnage and upwards and passenger ships irrespective of size constructed on or after 1 July 2011
What should the accuracy of a BNWAS be?
Accuracy : The alarm system should be capable of achieving the timings with an accuracy of 5% or 5 s, whichever is less, under all environmental conditions. Malfunction: If a malfunction of, or power supply failure to, the BNWAS is detected, this should be indicated.
