• restructuring of the directory layout
• Makefile now autodetects library locations: make will only build for installed SDR libraries
• recalibration of decoding parameters resulting in a small improvement in sensitivity
• added instructions and a solution file for building AIS-catcher with RTL-SDR support on Windows using Visual Studio 2019 and above (at a few requests)
• proper call to close devices at the end of the program and automatic termination if device is disconnected. For Windows please use the latest version of the rtl-sdr library with this fix.
• ZMQ support: ability to easily transfer data from GNU Radio to AIS-catcher