The SM Electrics GUARDIAN BNWAS Local Control Module (LCM), model 210.24.0.0, is the central processing and control unit of a SOLAS-compliant Bridge Navigation Watch Alarm System (BNWAS). This module, part of system 770281.221, is designed to enhance maritime safety by automatically monitoring watch officer presence on the bridge and initiating a cascading alarm sequence if no reset is detected within pre-set time intervals.
Key Functions & Features:
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Central Control:Â Serves as the main hub for the BNWAS network, connecting to reset stations, visual/audible alarms, and remote monitoring panels.
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Timer Management:Â Programs and manages the critical timing sequence:
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Dormant Period:Â Initial grace period (3-12 minutes, typically adjustable).
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First Stage Alarm:Â Low-level visual alarm on the bridge.
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Second Stage Alarm:Â Visual and audible alarm on the bridge and in the back-up officer’s cabin.
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Third Stage Alarm:Â Visual and audible alarm in locations to alert other crew members.
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Reset Function Interface:Â Accepts inputs from multiple, strategically placed reset buttons (e.g., at conning stations, radar displays) to acknowledge officer activity.
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Alarm Output Control:Â Triggers remote alarm indicators (strobes, beacons, buzzers) in designated locations as per the alarm stage.
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System Monitoring:Â Continuously self-checks for faults within the BNWAS circuitry and provides system status indications.
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Manual Activation/Override:Â Allows for manual activation of the system when the bridge is unattended (e.g., in port) and override functions as required.
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Compliance:Â Engineered to meet IMO SOLAS Chapter V Regulation 19, IEC 62616 standards, and relevant classification society rules (e.g., DNV, ABS, LR).
Typical Applications:
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Merchant vessels (cargo ships, tankers, container ships)
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Passenger ships (cruise ships, ferries)
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Other SOLAS-compliant commercial vessels requiring a certified BNWAS.
System Integration:
This LCM is the core of the GUARDIAN BNWAS system, designed to interface seamlessly with other SM Electrics components such as:
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Remote Reset Stations
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Visual Alarm Beacons (e.g., red strobe lights)
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Audible Alarm Sounders
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Bridge Door Monitoring Switches (optional)
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Central Alarm Panel or Integrated Navigation System (INS) for status display.















