Paragraphs 2.2.3 and 2.2.4 relating to the Bridge Navigational Watch Alarm System (BNWAS) were added to SOLAS Chapter V/19 at MSC86 in June 2009. A Bridge Navigational Watch Alarm System (BNWAS) required to be installed on all ships from 1 July 2011.
This ClassNK Technical Information is intended to provide information regarding the requirements related to the implementation of BNWAS for seagoing ships.

1. Applicable ships
These new requirements shall apply to the following types of ships:
(1) All cargo ships of 150GT and upwards; and
(2) Passenger ships irrespective of size.

2. Application due date
The due dates for ships to be fitted with a BNWAS are as follows:
(1) Ships constructed on or after 1 July 2011, not later than the initial Safety Equipment Survey (SE survey);
(2) Passenger ships constructed before 1 July 2011, not later than the first SE survey after 1 July 2012;
(3) Cargo ships of 3,000 GT and upwards constructed before 1 July 2011, not later than the first SE survey after 1 July 2012;
(4) Cargo ships of 500 GT and upwards constructed before 1 July 2011, not later than the first SE survey after 1 July 2013;
(5) Cargo ships of 150 GT and upwards constructed before 1 July 2011, not later than the first SE survey after 1 July 2014; and
(6) Ships constructed before 1 July 2011 but delivered after the due dates of (2) to (5) above, not later than the initial SE Survey

3. Performance standards and type-approval for BNWAS
(1) Summary of IMO Performance Standards MSC.128(75):
(i) The system shall comply with environmental test requirements;
(ii) The system should incorporate the following operational modes: Automatic, Manual On and Manual Off;


(To be continued)