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The Furuno BR-500 is a Bridge Navigational Watch Alarm System (BNWAS) designed to monitor the presence and alertness of the Officer of the Watch (OOW). The system requires periodic acknowledgement through a reset panel, motion detector, or interfaced navigation equipment such as Radar or ECDIS.
If the watch officer fails to respond within the selected interval, the system generates progressive visual and audible alarms and subsequently alerts backup personnel and cabin locations. The BR-500 supports Manual OFF, Manual ON, and Automatic modes, with a selectable dormant period of 3 to 12 minutes. It also provides an ALR sentence output for VDR integration.
| Parameter | Specification |
|---|---|
| Product | Bridge Navigational Watch Alarm System (BNWAS) |
| Model | BR-500 |
| Main Alarm Panel | BR-510 |
| Processor Unit | BR-520 |
| Display | 4.3-inch Color LCD |
| Display Resolution | 480 × 272 pixels |
| Operational Modes | Manual OFF, Manual ON, Automatic |
| Timer Interval | 3 to 12 minutes |
| Operational Signal Inputs | 4 channels, Normally Open |
| Autopilot Input | 1 channel, Normally Open |
| Backup Navigator Input | 1 channel, Normally Closed |
| System Failure Outputs | 2 channels |
| Serial Output | 1 × IEC 61162-1 |
| VDR Interface | ALR sentence output |
| Maximum Cabin Panels | 12 sets |
| Maximum Timer Reset Panels | 6 sets |
| Maximum Motion Detectors | 2 channels |
| Maximum Flash Beacons | 3 channels |
| Cabin Panel | BR-540, optional |
| Timer Reset Panel | BR-530, optional |
| Watertight Timer Reset Panel | BR-550, optional |
| Motion Detector | BR-560, optional |
| Flash Beacon | BR-570, optional |
| Motion Detection Method | Infrared body motion sensing |
| Motion Detection Distance | Up to 5 m |
| Motion Detection Speed | 0.8 to 1.2 m/s |
| Main Power Supply | 100–230 VAC, 1 phase, 50/60 Hz |
| Backup Power Supply | 24 VDC |
| Operating Temperature – BR-550 | -25°C to +55°C |
| Operating Temperature – Other Units | -15°C to +55°C |
| Relative Humidity | 93% at +40°C |
| Protection – BR-550 | IP56 |
| Protection – BR-520 | IP22 bulkhead mount / IP20 tabletop |
| Protection – Other Units | IP22 |
| Standards | IMO MSC.128(75), IEC 62616 Ed.1, IACS UR E27 |
| Languages | English, Japanese, Russian, Chinese, Korean |
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