There was a download of ShipPlotter 12.5.5.5 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The latest version of the program is supported on PCs running Windows XP/Vista/7/8/10/11, 32-bit.
The software lies within System Utilities, more precisely Device Assistants. The actual developer of the free software is shipplotter. The most frequent installation filename for the program is: ShipPlotter.exe. The most popular versions among ShipPlotter users are 12.5, 12.4 and 12.3. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
ShipPlotter is a program that displays complete information about ships that are within VHF range of your position using the Universal Automatic Identification System (AIS). ShipPlotter decodes the AIS digital signals from each ship using the sound card in your PC. You need a suitable VHF band radio receiver tuned to one of the two AIS channels.
You may want to check out more software, such as CombiPlotter, which might be similar to ShipPlotter.