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Bridge Navigation Watch Alarm System BNWAS Martek Marine Ltd

BNWAS • Bridge navigational watch alarm system (BNWAS) • Addition to SOLAS Chapter V, Regulation 19, new Sub Chapter 2.2.3 • MSC 75/24/add.1 – equipment performance standards • IEC-62616 - International Standard for BNWAS • Will apply to all passenger vessels and all vessels of 150gt or over • Monitors that the Officer of Watch (OOW) is present on the bridge • To prevent marine accidents and improve safety

History • Proposed by Danish/ Bahamas Flags at IMO, •

Adopted by IMO June 2009

• Submission after vessel collided with road bridge in Danish waters • Denmark Flag has this as a requirement for their vessels since 2003

Compliance Schedule

Compliance Schedule

Compliance Schedule • BIMCO Guidance to Members on Installing BNWAS systems • Bridge Navigational Watch Alarm Systems • Members are reminded about the amendments to SOLAS Chapter V, regulation 19 - Bridge Navigational Watch Alarm Systems (BNWAS). • BNWAS will become mandatory for all new ships upon delivery, and existing ships will be required to retrofit the equipment “at the first survey”, in accordance with the application schedule set out below, based on ship type, Gross Tonnage (GT) and keel laying date.

Compliance Schedule • Although the “first survey” may not concur with a dry docking, owners should note that considerable work might be required for retrofitting this equipment, which could take the ship out of service. • Consideration should therefore be given to carrying out the necessary modifications in dry dock before the mandatory implementation date. The agreement of the ship’s flag administration would be required to postpone retrofitting beyond this date.

Danish Survey • Two types of systems used: • with a push button re-set function • activity sensor to monitor for bridge inactivity • DMA carried out a survey of BNWAS systems used on Danish flagged vessels – For systems with a re-set button many false alarms were generated – These systems were seen as a source of irritation/stress

Danish Survey – For systems with an activity sensor there were few false alarms generated – These systems were felt to be a source of re-assurance • From the answers it was concluded systems with only a re-set button should be avoided • Systems should include an activity sensor to reduce stress and inconvenience to the Officer of Watch

MSC 75/24/add.1 • The system must Monitor that the OOW is present on navigation bridge • Series of warning lights and audible Alarms must be produced • Operational when ships heading/track control is working • 1st level alarm for the OOW on bridge to acknowledge • 2nd level for the Captain and/or officer cabins • 3rd level common areas • Any alarm can only be re-set from the bridge itself • 3 modes of operation: Automatic, On, Off

MSC 75/24/add.1 • There must be provision of an emergency call press button • System set up options must be security protected • Power failure must be indicated • If the system is tampered with this must be indicated • Operational mode of the system should be indicated • Inputs should be available from other bridge equipment that can generate an alarm signal. • Outputs should be available to bridge audio, VDR (IEC-62616) • Power failure signal has to be sent to IAS if available

MSC 75/24/add.1 • Max dormant period before an alarm, 3-12mins. Captain decides • If exceeded a warning light flashes on panel for 15 secs • Then a continuous warning light and Level 1 audible Alarm generated for a further 15 secs on panel – optional VDR • Then the Level 2 warning light on panel and audible alarms generated– Captain/officers cabins, optional VDR • Then Level 3 warning light on panel and audible alarms generated- common areas, optional VDR • The period of time between level 2 and level 3 alarms can be between 90-180 secs. Captain decided



• Single control & alarm panel – wall & console, 3 specifications • Then build up system to meet your needs: • In accordance with performance standards MSC.128 (75) & IEC 62616, motion sensors and reset buttons “should be easily accessible from the conning position, the workstation for navigating and manoeuvring, the workstation for monitoring and the bridge wings - Select how many activity PIR sensors? (8 max) – Not LR -

Select how many re-set buttons? (6 max) – illuminated & bridge wing option


Select the number of audio alarms for bridge, cabins and common areas


Select amount of cable



• Added Value and benefit: • Option panel with built in PIR sensor – lowest cost option for small bridge • Option panel with SD card for recording alarm event history • Option to install Video Camera to record bridge activity before, during and 15min after alarm phase • Only one type of cable required and no junction boxes • Devices can be connected in series reducing installation time and cost • Level 4 alarm indication fitted as standard to allow connection to ship’s general alarm • Port security operating mode allows unmanned bridge to be protected in port



• 8x digital inputs – level 2/3 alarm • 14x relay outputs and 2x RS485 outputs • Tamper proof detection • Emergency call button for immediate assistance – system goes to Level 2/3 alarm • Battery back up for 6hrs (IEC -62616) • System menu options (password protected): Password manager, Operational mode, Dormant period, Cabin select, Level 2-3 stage interval, Port security timing, Emergency call

- Control Panel

- Reset Options

Bridge illuminated push-button reset

Directional PIR motion sensor for bridge Coverage = 12m W x 1.5m H @ 9m

IP68 Bridge wings reset with buzzer

360o PIR motion sensor for bridge Coverage = 7m dia.@ 2.4m High, 10.5m dia.@ 3.6m high

- Audible Alarms

Audible alarm for bridge, cabins & common areas

Optional High intensity 115dBA audio/visual alarm

- Option Items

Wide angle bridge video camera with microphone together with digital video recorder to capture real

integral SD-card &,SD-card reader

time bridge activity in the event of alarm initiation

100m coil of 8-core screened marine approved cable

- Summary • NavGard complies with MSC 75/24/Add.1 & IEC62616 standards • Type approved with all major Class Societies by end December 2010 • Build up system to your requirements • Built in PIR activity sensor offers lowest cost solution for small bridges • Video camera option to record and prove bridge activity in Alarm Phase • For a serious event the memory card will provide immediate onboard verification ( alarms and video) independent of VDR • Port Security for additional safety when bridge unmanned • Simplest installation – single cable and series installation • Martek’s experience allows us to help you fully for compliance requirements

Thank You! For more information visit:

Navgard BNWAS Presentation  
Navgard BNWAS Presentation  

Navgard - Martek Marine's bridge navigational watch alarm system (BNWAS) for compliance with SOLAS Chapter V Regulation 19.