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Marine Electronics

With years of experience, Pelig Ltd. has an international reputation as a reliable partner for navigation systems for the professional shipping and shipbuilding market. The product range comprises well-proven gyro compasses, adaptive autopilots, steering control systems, navigation radar, electronic sea charts (ECDIS), and highly customized Integrated Bridge and Navigation Systems (INS / IBS).

At Pelig Ltd. all projects are closely accompanied by project management, from project outline and specification of systems through project realization to setting in operation. The extended worldwide after sales service contributes to low operation costs through minimized vessel downtime, maximum on-time arrivals and reduced workload ashore.

BNWAS Hardware Picture

The BNWAS (Bridge Navigation Watch Alarm System) is essentially a timer alarm system that forces watch officers to reset the system, in periodic time intervals, in order to ensure that they are fully alerted (not sleeping, paying computer games etc, etc).

The BNWAS is only required to be operational whenever the Ships Heading, or track control system is engaged, unless this manually over-ridden by the master onboard.

In essence, the BNWAS has the following operational characteristics:

  1. After the system has been activated (Autopilot in use), No alarm will sound for a period of 3 to 12 minutes.
  2. After this period, the system will initiate a visual alarm on the bridge
  3. If this is not reset within a period of 15 seconds, an audible alarm on the bridge is activated.
  4. If this not reset within a period of 15 seconds from last audible bridge alarm, then a second stage audible alarm is activated in a remote location (ships office, master office etc).
  5. If this is not reset within a period of 90 Seconds from the second audible alarm, a third stage alarm is activated in  another remote location, were other officers can take corrective action

Note: For any vessel other than a passenger ship, the second and third stage alarms, may sound in all of the above listed locations.

The Reset Function is Only available on the Bridge, and can be achieved by Push Buttons, which are generally fitted in the key navigational areas on the Bridge (Radio Console, Chart Table, Safety Console and Bridge Wings). However, as the BNWAS is required to be reset every 3-12x Minutes, it’s also possible to connect Motion Sensors which will automate the BNWAS re-set process, however, certain Flag States (e.g Singapore) will not allow PIR Motion sensors.

IMO Requirement for Implementation:

The IMO has mandated that all passenger and cargo ships must fit the BNWAS under SOLAS Chapter V Regulation 19, as they recognize that many bridge related marine incidents could be avoided if an effective and operational bridge navigational alarm system was fitted onboard.

Existing ships will be required to retrofit the equipment “at the first survey”, in accordance with the application schedule below, based on ship type, size and keel laying date.

BNWAS Timetable

Note: The BNWAS must be connected to the SVDR/VDR (If installed onboard)

Should you require any additional information and/or an offical proposal for the Interschalt BNWAS Hardware onboard, then please contact us.

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