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The SEAANGEL is a Search-and-Rescue Transmitter (AIS-SART), which transmits emergency signals via VHF in the maritime area. Based on the AIS technology precise position data is transmitted to surrounding vessels and base stations. As a result, missing persons will be localized faster and the chances of survival are increased dramatically.

The system can be mounted on lifejackets and life rafts and is operating autonomously. If it is activated manually or automatically, the distress signal is sent for more than 96 hours. Three activation mechanisms are supported:

  • automatically by water contact
  • manually by pressing a button
  • manually by pulling a ripcord

The SEAANGEL was developed according to IEC 61097-14 and thus comply to the highest requirements for man overboard rescue systems. It is battery powered, waterproof and shockproof and can be used under extreme ambient temperatures down to -20°C.

Customer: FT-TEC Electronics GmbH

What is AIS?

AIS stands for Automatic Identification System and is a communication system that operates over registered channels within the maritime mobile VHF band as a self-organizing time slot method (161.975 MHz and 162.025 MHz). It is based upon an open, unencrypted protocol with which information is transmitted and received autonomously with no interaction from ship or operating personnel. In addition to this autonomous mode, capabilities are also provided for the transmission of short, safety-related messages when there is human interaction.

The information generated autonomously and transmitted to other ships or to shore via a broadcast is dynamic information such as position, speed and course, but also static and cruise-related information such as draft and ship type. Transmission is at regular intervals, whereby the interval depends on the speed and any course changes of the particular ship. This information is processed by the receiver and can be visualized on a display, generally an Electronic Chart Display and Information System (ECDIS). Current position information is referenced geographically with the respective ship identification of the AIS stations received and displayed on a digital map.

For further information see

See also Moitessier HAT, USB AIS receiver, OpenSeaNav, Wi-Fi AIS receiver/multiplexer.


  • design, schematic and layout of the assembly
  • firmware implementation (low-level)
  • EMC testing
  • implementation of a GMSK baseband signal algorithm
  • 3D rendering for the user manual and various advertising material

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