Bridge Navigational Watch Alarm System (BNWAS)
Product catalog
BW-707 Bridge Navigational Watch Alarm System has all required approval certificates, including a certificate of compliance with a technical regulation on the safety of inland water transport facilities.
BW-707 Bridge Navigational Watch Alarm System (BW-707 BNWAS) is designed to monitor the Officer of the Watch (OOW) awareness. It automatically alerts the Master or another qualified OOW if, for any reason, the OOW becomes incapable of performing the OOW’s duties. A series of indications and alarms achieve this purpose first to alert the OOW and, if he is not responding, then alert the Master or another qualified OOW. Additionally, BW-707 BNWAS also provides the OOW with a means of emergency calling for immediate assistance.
System diagram
System description
The BNWAS consists of the control unit, connecting module, reset button, 1st Stage Alarm, 2nd Stage Alarm, 3rd Stage Alarm, and AC adapter.
BW-707MAIN Operating Unit
Display screen: 2*16 LCD
Internal buzzer: for 1st Stage Alarm
Key switch S1: operational modes and settings
Knob S2: system’s settings and adjustment
Emergency button S3: emergency call trigger and reset
No power indicator L1 signalizes the absence of the main power supply.
Normal operation indicator L2 signalizes the correct system operation.
Indicator AUTO signalizes automatic mode operation.
Indicator ON signalizes that manual mode is on.
Indicator OFF signalizes that manual mode is off.
Installation location: flying bridge
Installation method: vertical or flush mounting
Internal buzzer: for 1st Stage Alarm
Key switch S1: operational modes and settings
Knob S2: system’s settings and adjustment
Emergency button S3: emergency call trigger and reset
No power indicator L1 signalizes the absence of the main power supply.
Normal operation indicator L2 signalizes the correct system operation.
Indicator AUTO signalizes automatic mode operation.
Indicator ON signalizes that manual mode is on.
Indicator OFF signalizes that manual mode is off.
Installation location: flying bridge
Installation method: vertical or flush mounting
BW-707CONN Connecting Module
Installation location: flying bridge
Installation method: TS35 rail mounting
Installation method: TS35 rail mounting
BW-707R Reset button
Installation location: flying bridge
Installation method: flush mounting
Hole dimension: Dia 22.5 mm
Quantity: max. 5 pcs
Installation method: flush mounting
Hole dimension: Dia 22.5 mm
Quantity: max. 5 pcs
BW508RA1 1st Stage Alarm for installation on open decks
Installation location: bridge wings, etc.
Installation method: wall mounting
Quantity: max. 3 pcs
BW-707А2 2nd Stage Alarm
Installation location: officer’s cabins
Installation method: wall mounting
Quantity: max. 6 pcs
BW-707А3 3rd Stage Alarm
Installation location: corridors and crew location areas.
Installation method: wall mounting
Quantity: max. 3 pcs
Technical specifications
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Operating temperature: -5°C to +55°C
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Relative humidity: 93%+2% (at 40°C±3°C)
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Supply voltage: 24V (nominal)
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Power consumption: 75W or less
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Timing accuracy: less than 5% or 5s
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1st Stage Alarm tone: 8 types
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1st Stage Alarm volume level: 75~85db/1m
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2nd Stage Alarm volume level: 75~120db/1m
Interfaces
| Name | I/O | Signal type |
| Autopilot | Input | Switching |
| Emergency call | Input | switching |
| External reset devices | Input | Switching |
| Status | Output | ALR/switching |
| Malfunction | Output | Switching |
System configuration
1. BW-707 BNWAS, Basic Configuration
Contains:
Control Unit — 1 pce.
Switching Unit — 1 pce.
1st Stage Acknowledgment Button — 2 pcs.
2nd Stage Alarm — 3 pcs.
2. BW-707 BNWAS, Configuration #1
Contains:
Control Unit — 1 pce.
Switching Unit — 1 pce.
1st Stage Acknowledgment Button — 2 pcs.
2nd Stage Alarm — 3 pcs.
1st Stage Alarm for installation on bridge wings — 2 pcs.
3. BW-707 BNWAS, Configuration #2
Contains:
Control Unit — 1 pce.
Switching Unit — 1 pce.
1st Stage Acknowledgment Button — 2 pcs.
2nd Stage Alarm — 3 pcs.
3rd Stage Alarm — 1 pce.
4. BW-707 BNWAS, Configuration #3
Contains:
Control Unit — 1 pce.
Switching Unit — 1 pce.
1st Stage Acknowledgment Button — 2 pcs.
2nd Stage Alarm — 3 pcs.
1st Stage Alarm for installation on bridge wings — 2 pcs.
3rd Stage Alarm — 1 pce.
Reference Information
СOn 1 January 2011, the amendments to SOLAS Chapter V “Safety of Navigation” entered into force. Regulation 19 has been revised to include Electronic Chart Display and Information Systems (ECDIS) and Bridge Navigation Watch Alarm Systems (BNWAS).
According to the new regulations of the Russian Maritime Register of Shipping, new and existing vessels shall be fitted with a bridge navigational watch alarm system (BNWAS), as follows:
- 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;
- ships of 3,000 gross tonnages and upwards constructed before 1 July 2011, not later than the first survey after 1 July 2012;
- ships of 500 gross tonnages and upwards but less than 3,000 gross tonnages constructed before 1 July 2011, not later than the first survey after 1 July 2013; and
- ships of 150 gross tonnages and upwards but less than 500 gross tonnages constructed before 1 July 2011, not later than the first survey after 1 July 2014.