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Watch Alarm System (BNWAS)
Uni-Safe Electronics A/S
New product
Uni-Safe BW-800 Bridge Navigational Watch Alarm System (BNWAS) | Bridge Watch Alarm Panel | Marine Bridge Watch System | SM MARINE SERVICE™
The Uni-Safe BW-800 Bridge Navigational Watch Alarm System (BNWAS) is a marine safety system developed to ensure that the Officer of the Watch (OOW) remains alert while navigating the vessel. Installed on thousands of commercial ships worldwide, the BW-800 continuously supervises bridge activity and automatically activates a sequence of alarms if no operator action is detected within the selected monitoring period.
The primary purpose of the BW-800 is to reduce the risk of accidents caused by fatigue, distraction, or incapacitation of the bridge watch officer. If the bridge officer fails to acknowledge the system within the preset time, the BNWAS initiates visual and audible alarms on the bridge and, if necessary, escalates the alarm to backup officers and crew accommodation.
The Uni-Safe BW-800 fully supports IMO SOLAS Chapter V requirements and is commonly integrated with bridge navigation equipment such as Radar, ECDIS, Autopilot, AIS, and Voyage Data Recorder (VDR).
SM MARINE SERVICE™ supplies new, used, and professionally reconditioned Uni-Safe BW-800 BNWAS units, including control panels, interface modules, PCB boards, power supplies, relay modules, spare parts, repair services, and worldwide technical support.
| Item | Details |
|---|---|
| Manufacturer | Uni-Safe Electronics A/S |
| Country of Origin | Denmark |
| Model | BW-800 |
| Product Type | Bridge Navigational Watch Alarm System (BNWAS) |
| Marine Application | Navigation Bridge Safety System |
| Compliance | IMO SOLAS Chapter V / MSC.128(75) BNWAS Requirements |
The BW-800 Bridge Watch Alarm System continuously monitors the activity of the bridge watch officer during navigation.
The officer must periodically acknowledge the system by pressing the RESET button or by automatic activity inputs from approved navigation equipment. If no acknowledgement is received before the timer expires, the system activates a visual bridge alarm, followed by progressively louder audible alarms and eventually notifies additional officers or crew members.
This escalation process ensures that another qualified person can quickly respond if the Officer of the Watch becomes unable to perform navigational duties.
The BW-800 is a simple yet highly effective safety system that significantly improves bridge resource management and navigational safety.
The Uni-Safe BW-800 offers several important operational features:
The Uni-Safe BW-800 Bridge Navigational Watch Alarm System consists of several electronic and control modules that work together to monitor bridge activity and initiate alarm sequences.
Main components include:
These modules ensure continuous monitoring of bridge officer activity and reliable alarm escalation in accordance with IMO requirements.
| Specification | Details |
|---|---|
| Model | BW-800 |
| Manufacturer | Uni-Safe Electronics A/S |
| Product Type | Bridge Navigational Watch Alarm System (BNWAS) |
| Power Supply | 24 VDC |
| Backup Supply | 24 VDC |
| Alarm Levels | Visual + Three Audible Alarm Stages |
| Timer Setting | Adjustable |
| Operating Modes | Manual / Automatic |
| Communication | VDR Output |
| Installation | Navigation Bridge |
| Compliance | IMO MSC.128(75), SOLAS Chapter V |
The BW-800 continuously monitors bridge activity while the vessel is underway.
The operating sequence is as follows:
This staged alarm process ensures rapid assistance if the watch officer becomes incapacitated.
The Uni-Safe BW-800 is widely installed on:
It is normally integrated with:
To ensure reliable operation:
Regular maintenance helps maintain compliance with IMO and Flag State inspections.
The BW-800 remains popular because it offers:
Many commercial vessels continue operating the BW-800 successfully for years with routine maintenance.
A BNWAS continuously checks that the Officer of the Watch remains alert and capable of safely navigating the vessel.
Yes. It is designed to meet IMO BNWAS performance requirements under SOLAS Chapter V.
Yes. The system provides VDR alarm output for recording bridge alarm events.
Yes. The system supports a 24 VDC backup power supply to ensure operation during power interruptions.
Yes. SM MARINE SERVICE™ supplies control panels, timer modules, PCB boards, power supply units, relay boards, reset switches, interface modules, wiring harnesses, and other replacement parts.
The Uni-Safe BW-800 Bridge Navigational Watch Alarm System (BNWAS) is an IMO-approved bridge safety system designed to monitor officer alertness through an adjustable timer and multi-stage alarm sequence. By automatically escalating alarms and notifying additional crew members when required, it enhances navigational safety and ensures compliance with SOLAS regulations.
Recommended documentation includes:
SM MARINE SERVICE™ supplies New, Used, and Professionally Reconditioned Uni-Safe BW-800 Bridge Watch Alarm Systems with worldwide delivery and technical support.
Our services include:
Bangladesh Office
Samir Market, DT Road, Pahartali, Beside CDA Market, Chattogram, Bangladesh
China Warehouse & Support Center
Shanghai, China
Website: www.smmarineservice.com
Email: info@smmarineservice.com
WhatsApp: +8801818929292
Marketing Contact: Nazmul Hasan Bhuiyan
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