Regulations are as follows (according MSC 86/26/Add.1 ANNEX 1):
- cargo ships of 150 gross tonnage and upwards and passenger ships irrespective of size constructed on or after 1 July 2011;
- passenger ships irrespective of size constructed before 1 July 2011, not later than the first survey after 1 July 2012;
- cargo ships of 3,000 gross tonnage and upwards constructed before 1 July 2011, not later than the first
survey after 1 July 2012;
- cargo ships of 500 gross tonnage and upwards but less than 3,000 gross tonnage constructed before 1 July 2011, not later than the first survey after 1 July 2013;
- cargo ships of 150 gross tonnage and upwards but less than 500 gross tonnage constructed before 1 July 2011, not later than the first survey after 1 July 2014.
The bridge navigational watch alarm system shall be in operation whenever the ship is underway at sea.
Working of the system in short:
The BNWAS system is built up in 3 alarm stages:
First stage bridge audible alarm
The first stage audible alarm which sounds on the bridge at the end of the indication period shall have its own characteristic tone or modulation intended to alert, but not to startle the OOW (Officer On Watch). This function may be engineered using one or more sounding devices. Tone/modulation characteristics and volume level shall be selectable during commissioning of the system.
Second and third stage remote audible alarm
The remote audible alarm which sounds in the locations of the Master, the officer(s) and further crew members capable of taking corrective action at the end of the bridge audible alarm period shall be easily identifiable by its sound and should indicate urgency. The volume of this alarm shall be sufficient for it to be heard throughout the locations above and to wake sleeping persons.
For more information please feel free to contact our Deepsea Sales Department:
Alphatron Marine BV / Deepsea Sales Department
Tel. no.: +31 (0) 10- 45 34 000
E-mail: deepsea@alphatronmarine.com
Our team is pleased to assist you and provide you with a suitable quotation.
