Bridge Navigational Watch Alarm System (BNWAS) Installation & Class Testing India
Seanav Marine provides statutory BNWAS (Bridge Navigational Watch Alarm System) supply, stage-escalation testing, motion sensor calibration, and annual Class certification across all Indian ports. Our engineers service Furuno BR-500, Ninglu BW508, and TotemPlus BNWAS units, verifying mandatory 3-to-12 minute dormant period timing, Officer cabin sounders, and general crew alarm cut-ins to ensure 100% SOLAS compliance.
Supported OEM Equipment & Multi-Make Coverage
Send the equipment make and model so we can confirm the scope and parts availability.
Technical Specifications & Operational Coverage
| System Architecture | Master Control Unit, Bridge Reset Panels, Passive Infrared (PIR) Motion Sensors, Cabin Alarm Sounders |
|---|---|
| Supported Hardware | Furuno BR-500, Ninglu BW508, TotemPlus BNWAS, Martek Marine Watchgard, Highlander HLD-BNWAS |
| Regulatory Standards | SOLAS Chapter V Regulation 19.2.2.3, IMO Resolution MSC.128(75), IEC 62616 |
| Operational Modes | Automatic (Activated on Autopilot engagement), Manual ON (24/7 running), Manual OFF (In port only) |
| Alarm Escalation Timing | Dormant period (3–12 min) -> Stage 1 Visual -> Stage 1 Audio (15 sec) -> Stage 2 Officer Cabins (15 sec) -> Stage 3 Crew Audio |
| Attendance SLA | Boarding within 2 hours at JNPT/Mumbai; 24/7 fly-away attendance across all Indian major ports |
Standard 5-Step BNWAS Multi-Stage Escalation & Sensor Test Protocol
Our Class-approved technicians execute this standardized procedural workflow to ensure first-time compliance with attending Class surveyors and Indian Port State Control (PSC) inspectors:
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Mode Selector Key Switch & Autopilot Interlock Audit
Verify master security key switch prevents unauthorized deactivation; test automated cut-in upon autopilot engagement.
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Bridge Push-Button & PIR Motion Sensor Reset Timing Check
Verify tactile push-button resets on bridge wings and radar consoles; test PIR motion detector coverage across wheelhouse walkways.
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Stage 1 Visual Flasher & Bridge Audible Tone Verification
Time dormant interval countdown (set between 3 and 12 minutes); verify gentle visual flash followed by high-intensity bridge buzzer.
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Stage 2 Navigation Officer Cabin Escalation Test
Allow 15 seconds without bridge reset; verify loud audible alarm triggers in Back-up Officer and Master staterooms.
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Stage 3 General Crew Alarm Cut-In & VDR Alert Logging
Verify Stage 3 public alarm cut-in across crew mess and accommodation spaces; confirm alarm sentence transmission to VDR.
24/7 Port & Anchorage Attendance Across India
Seanav Marine provides rapid shore-based and offshore launch boat boarding across all 170+ Major and Minor Indian Ports, including:
Certified Equipment & Replacement Spares in Stock
Seanav Marine maintains bonded warehouse spare parts inventory across major Indian ports for immediate dispatch and installation during port calls:
Download Master's BNWAS Operational & Survey Readiness Checklist
Stage timing limits, motion sensor blind-spot troubleshooting, and emergency power failover checks.