Downloading RSO Distance Tool 4.0 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The common filename for the program's installer is rso.exe. The most popular versions of the program are 4.0 and 3.0.
The latest version of RSO Distance Tool can be downloaded for PCs running Windows XP/7/8/10/11, 32-bit. The software relates to Games. 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. The actual developer of the free program is Eurocontrol.
From the developer:
The RSO (Route per State Overflown) Distance Tool is an application that allows airspace users to estimate the charges for the flights operated throughout EUROCONTROL charging area. With this application airspace users can calculate the chargeable distance of a flight plan and can obtain an estimate of the charges they will incur when operating flights within the EUROCONTROL charging area.
You may want to check out more software, such as 3D-Tool FreeViewer, Excel Unlocker Tool or Recovee OST Viewer Tool, which might be related to RSO Distance Tool.
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