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The Consilium BW-800 is a Bridge Navigational Watch Alarm System (BNWAS) designed to monitor the activity and alertness of the Officer of the Watch (OOW). If no activity or reset action is detected within the selected dormant period, the system initiates a sequence of visual and audible alarms.
The system first alerts the OOW on the bridge. If the alarm is not acknowledged, subsequent alarm stages alert the Master, backup officer, or other designated personnel, helping to reduce the risk of accidents caused by incapacitation or inattention.
The BW-800 supports manual and automatic operating modes, adjustable dormant periods, external reset inputs from bridge equipment such as radar or ECDIS, and integration with the ship’s autopilot/track control system. It also provides an NMEA 0183 alarm output for VDR recording.
| Specification | Details |
|---|---|
| Manufacturer | Consilium / Bridge Navigational Watch Alarm System |
| Model | BW-800 |
| Equipment Type | Bridge Navigational Watch Alarm System (BNWAS) |
| Application | Monitoring Officer of the Watch activity |
| Operating Modes | Manual / Automatic |
| Dormant Period | Adjustable from 3 to 12 minutes |
| Main Power Supply | 24 V DC |
| Battery Backup Supply | 24 V DC |
| Backup Duration | Minimum 6 hours |
| Minimum Backup Battery Capacity | 3 Ah |
| Maximum Fuse Rating | 4 A external fuse (depending on manual revision) |
| System Power Consumption | Approx. 150 mA without activated alarms |
| Alarm Unit Consumption | Approx. 200 mA per alarm unit (manual revision dependent) |
| Maximum Current Draw | Up to 4 A |
| Reset Input | Manual reset unit and external activity inputs |
| External Reset Equipment | Radar, ECDIS or other bridge equipment |
| Autopilot Interface | Positive and negative pulse inputs |
| Motion Sensor Supply Output | 12 V DC |
| VDR Interface | NMEA 0183 / IEC 61162-1 |
| VDR Message | ALR alarm sentence |
| Malfunction Output | External alarm relay output |
| Failure Monitoring | Internal fault, main power failure and backup power failure |
| Main Unit Mounting | Panel / Flush mounting |
| Main Unit Dimensions | Front: 160 × 100 mm |
| Main Unit Cut-out | Approx. 136 × 96 mm |
| Main Unit Depth | Approx. 55 mm |
| Main Unit Weight | Approx. 0.7 kg |
| Compass Safe Distance | Approx. 30 cm |
| Reset Unit 801 | Panel-mounted reset push-button |
| Reset Unit Dimensions | 60 × 60 mm |
| Alarm Unit 802 | Visual and audible alarm unit |
| Alarm Unit Dimensions | 120 × 60 mm |
| Backup Officer Selector 803 | Optional backup officer selection unit |
| Motion Sensor 805 | Optional automatic activity detection |
| Motion Sensor Supply | 9–16 V DC |
| Motion Sensor Current | Approx. 28 mA at 12 V DC |
| Motion Sensor Detection Coverage | Up to 12 × 12 m / 90° field of view |
| Open Bridge Wing Reset Unit | IPX6 versions available |
| Cable Requirement | Marine-approved cable, typically 0.5–1 mm² |
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