[sailoog.com]

pinguino mira lo que dice, igual es lo que te estaba pasando a ti:

Test with: rtl_fm -f 161975000 -p 35 -s 48k | aisdecoder -h 127.0.0.1 -p 10110 -a file -c mono -d -f /dev/stdin be sure to try all possible values for -p! this program is very picky and your value must be +- 7 of the correct value to get messages (Range +- 128) the exact correct value gives many more messages. The plugin provides an automatic detection routine.