The sMRT AU11 is a commercial-grade Maritime Survivor Locating Device (MSLD) that combines advanced AIS, VHF DSC, and 121.5MHz technology for enhanced localised alerting, tracking, and recovery. Its water-activation technology and audible and visual indicators, ensure rapid and efficient man overboard (MOB) recovery. The device's increased signalling range and Class M compliance guarantee reliable tracking over extended distances, making it highly effective in man-overboard incidents.

Automatic activation alerts you to every MOB incident within 2-5 seconds, with GPS positions updated every minute via AIS. This ensures that you and every nearby vessel can become instant SAR assets, capable of tracking multiple casualties up to 75 miles away, significantly enhancing safety and effectiveness during emergencies.

This product is available to hire as part of a customised rental solution.

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*Dependent on weather conditions, quality and height of receiving antenna.


    Nearby vessels are automatically alerted about the man-overboard situation via DSC technology.

  • AIS

    The live location of the individual overboard is continuously updated and displayed through AIS technology.

  • 121.5 MHz

    Features a low power homing signal to assist marine and aviation rescue efforts

  • Dual GNSS

    Integrated GPS and Galileo receivers ensure rapid, global detection, enhancing accuracy in locating the individual.

  • Class-M Compliance

    Compliant with European regulation ECC/DEC/(22)02 pertaining to MOB device usage, ensuring adherence to international standards.

  • Water Activation

    Activates automatically when submerged in water for 2 seconds, ensuring a swift response in emergency situations.

  • Strobe Light

    Features a high-powered strobe light for enhanced visual identification during night-time, aiding rescue efforts in low-light conditions.

  • Coloured LEDs

    LEDs change colour based on the beacon's status, providing visual cues for device functionality and alerts.

  • Arming Door

    Includes a swing door mechanism to prevent unintended arming and activations, reducing the risk of false alarms.

  • Audible Alarm

    Features an audible alarm to aid in location and alert users of potential false activations, enhancing user awareness.

  • Dual Activation Methods

    Can be activated manually or upon water immersion, ensuring functionality even if the user is incapacitated or unable to activate the device.

  • Test Functionality

    Enables manual testing and app-based compatibility checks for power and functionality status, allowing users to verify device readiness.

  • Waterproof Design

    Designed to withstand water exposure, ensuring durability and reliable performance in marine environments.


The sMRT AU11 AIS DSC MOB offers an advanced man-overboard solution with AIS, VHF DSC, and 121.5 MHz technologies in a compact, durable design. It prioritises user-friendliness without sacrificing functionality or reliability, making it ready for immediate deployment.

One of the key features of the sMRT AU11 is its water activation technology. The extended water sensor lead activates upon immersion, automatically sending a distress alert and MOB location. This feature, alongside manual activation, ensures the device operates effectively even in challenging situations.

Built for tough marine environments, the sMRT AU11 is housed in a rugged casing and features an extended water sensor lead, guaranteeing durability and resilience. 

Additionally, the sMRT AU11 includes an internal DSC receiver to receive and display DSC acknowledgements. It complies with the 2024 ECC Class M requirements for Man Overboard devices, meeting current industry standards and anticipating future safety needs.




121.5 MHz

Class M

Class M



Water Activated

Water Activated

Find Us

Marine Rescue Technologies Limited
Wescom Group,
Unit J1, Springfield Way,
Anlaby, HU10 6RJ