It's not too difficult to make the Debeg 6310 marine VHF suited for the recepton of AIS by adding a discriminator output.
The receiver IC, a uPC1028, is located on the main circuit board. The easiest way to connect to this IC is on the solder side of the board.
The unfiltered audio on the FM IC can be found on pin 7.
Pin 7 of the uPC1028 contains the baseband audio
The discriminator output
Follow the next steps to make the discriminator output:
I have chosen not to put a chassis socket in the case, but to use a 'pig tail' in stead. If a small hole is drilled below the antenna socket, the shielded wire can be led outside and terminated with a female cinch plug.
Obviously, it is also possible to use a longer cord and use a 3.5 mm plug to connect the signal directly with your PC's line or microphone input.