A hovercraft or other matter deriving whole or partial support during the ambiance with the reactions of air in opposition to the surface area on the h2o above which it operates: to stay away from the chance of contamination of any potable water supplies in compliance with Clause G12 Drinking https://fire-resistantmaterials95161.thenerdsblog.com/37726605/indicators-on-building-regulations-you-should-know