BAE installs SI and Sandbox private clouds on second QEC carrier 07 May 2021 (Last Updated May 7th, 2021 17:29) BAE Systems has revealed the installation of Shared Infrastructure (SI) and Sandbox private clouds to the second Queen Elizabeth Class (QEC) aircraft carrier HMS Prince of Wales. Share Article HMS Prince of Wales. Credit: Royal Navy. BAE Systems has revealed the installation of Shared Infrastructure (SI) and Sandbox private clouds to the second Queen Elizabeth Class (QEC) aircraft carrier HMS Prince of Wales. Deployment of these technologies allows the Royal Navy to trial and deploy new mission capabilities on a single, reliable digital platform.