---
name: "gnuais"
section: "1"
platform: "linux"
package: "gnuais"
version: "0.3.3-9.1+deb13u1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/gnuais"
---

# gnuais(1)

GNU Automatic Identification System receiver

## NAME

gnuais - GNU Automatic Identification System receiver

## SYNOPSIS

**gnuais** \[*options*\]

## DESCRIPTION

This manual page documents briefly the **gnuais** command.

**gnuais** is a tool for demodulating and decoding AIS messages using the line/mic input of the sound card. Connect the discriminator output of a VHF receiver tuned to either 161.975 MHz or 162.025 MHz to the line/mic input. Then run gnuais with no options or with some of the options described below.

## OPTIONS

A summary of options is included below.

- **-c \<filename\>**

  Specify config file to use. If not specified, a gnuais.conf file in the current directory is searched for, if not found, ~/.config/gnuais/config is used.

- **-f**

  Runs **gnuais** in the background.

- **-h**

  Shows the short command use info.

- **-l \<filename\>**

  Runs with raw audio data from file

- **-s \<filename\>**

  Saves raw audio data to file

- **-e \<level\>**

  Log level: INFO, DEBUG, NOTICE, WARNING, ERR, CRIT, ALERT, EMERG

- **-o \<dest\>**

  Log destination: none, file, stderr, syslog.

- **-r \<dir\>**

  Log directory

- **-n \<name\>**

  Name of the log

## SEE ALSO

[**gnuaisgui**(1)](/gnuaisgui/1.md),\

## AUTHOR

This manual page was written by Ruben Undheim \<ruben.undheim@gmail.com\>, for the Debian project (and may be used by others).