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BNWAS Bridge Alarm System// Simplified Version Bridge Navigational Watch Alarm System - BNWAS
BNWAS Bridge Navigational Watch Alarm System as per IMO MSC 128(75) monitors the officer’s on the watch presence in Wheelhouse under sea going condition.
SELMA Bridge Inspector – Simplified Version is a version of BNWAS developed by SELMA for Light Crafts and small tonnage vessels with basic features:
- Touch Screen Technology
- PLC Control Type System
- Autopilot NMEA 0183 / Dry Contact Auto Mode Activation
- Heavy Duty Control Panel
- Separate Alarm Messages
SELMA Bridge Inspector BNWAS Bridge Navigational Watch Alarm System main objective is to monitor the activity in Wheelhouse and identify any disability of operator which could cause marine accidents.
In particular BNWAS monitors the awareness of Officer on the Watch (OOW) and automatically alerts the Master or another qualified OOW if for any reason the OOW becomes incapable of performing the OOW’s duties. Consequently a sequence of warning, indications and alarms alert first the OOW and if he is not responding then alert the Master or another qualified OOW.
Additional the BNWAS may provide the OOW with a means of performing Emergency Calling for immediate assistance if it is demanded.
It is important to be noted that the BNWAS should be operational whenever the Ship’s Heading or Track Control System is engaged and generates valid NMEA 0183 Signal according to IEC 61162, unless inhibited by the Master.
For more details please visit the SELMA Bridge Inspector BNWAS site bnwas.selmacontrol.com
Bridge Alarm System combines BNWAS and Bridge Alert Management System concentrating all the alarms from Navigation Instruments in Centralized Touch Screen.
SELMA Bridge Inspector BNWAS Bridge Navigational Watch Alarm System comprises of state-of-the art control and instrumentation technology with maximum performance capabilities, implementing monitoring and alarm function operation.
SELMA Bridge Inspector BNWAS comprises the following equipment:
- Main Display Unit (Touch Screen)
- Main PLC Panel
- UPS/Battery Charger Panel
- Bridge Remote Reset/Audible and Visual Alarm Stations
- Officer’s Cabins Remote Alarm/Sounder Stations
- Public Spaces Sounders
- Bridge Motion Detectors (Optional)
Bridge Inspector Technical Specifications
| Main Display Unit | TFT Touch Screen Type Alternative 1 : Amber Monochrome Alternative 2 : Colour (65,536 colors) |
|---|---|
| Main Processor Unit | PLC (Programmable Logic Controller) |
| PLC Digital I/O | Standard 36 (max 256) |
| Operation Modes (Protected) | Automatic / Manual On / Manual Off |
| Auto Mode NMEA Speed | 4,800 – 38,400 bps |
| NMEA 0183 Inputs | 1 – 4 Serial Ports IEC 61162 |
| Auto Mode Activation | GPS/Heading Track Control IEC 61162 Speed Log Pulse Input (200 – 400 pulses) Digital Free Contact NC / NO |
| Modbus PLC Ports | 2 |
| Ethernet PLC Port | 1 (Optional) |
| Motion Sensors Ports | Standard 2 (Expandable to 12) |
| Main Power Supply | 110 – 230V AC 50 / 60Hz |
| Emergency Power Supply | 24V DC |
| SELMA UPS | 6 Hours independent Emergency Operation |
| System Configuration Security | Removable Key / Password Protected (Master) |
| Dormant Period (Td) | 3 -12 min |
| First Stage Warning Indication | Active after Td |
| First Stage Alarm | Td +15 sec |
| Second Stage Alarm | Td +15 sec +15 sec |
| Third Stage Alarm | Td +15 sec +15 sec +(90-180) sec * or omitted ** |
| Bridge Remote Reset Stations | Standard 6 (Expandable) Watch Alarm, Emergency Call, Reset , Buzzer |
| Officers Cabin Station | Standard 5 (Expandable) Duty Call Lamp, Test Buzzer, Buzzer Activation |
| Public Spaces Sounders | Standard 2 (Expandable) |
| Tamper Protection | Separate Tamper Alarms Activation Protected |
| Supplementary PLC Outputs | VDR, Ship General Alarm System Optional NMEA Output $ALR, $AKN for VDR |
| Type Approved | IMO MSC.128(75) IEC60945 / IEC61162 / IEC62616:2010 |
For more details please visit the SELMA Bridge Inspector BNWAS site bnwas.selmacontrol.com