If you are installing this specific version, here are the major improvements you will find: What is multipart archive - GitHub Gist
: Open your extraction tool—such as WinRAR , 7-Zip , or PeaZip —and extract only the first part ( part1.rar ). The software will automatically pull data from part3.rar to complete the process. Key Features of the B130 Update UBOAT.B130.Early.Access.part3.rar
: Ensure you have all required parts (e.g., part1.rar , part2.rar , and part3.rar ) in the same folder . If you are installing this specific version, here