RFA Wave Knight Conducting RAS Operations. Replenishment at sea (RAS) (North Atlantic Treaty Organisation/Commonwealth of Nations) or Underway replenishment (UNREP) (US Navy) is a method of transferring fuel, munitions, and stores from one ship to another while under way. 1 History 1.1 Concept.
The international non-profit organization Council on Tall Buildings and Urban Habitat (CTBUH) was formed in 1969 and announces the title of The World's Tallest Building and sets the standards by which buildings are measured. It maintains a list of the 100 tallest completed buildings in the world. The organization currently ranks Burj Khalifa in Dubai as the tallest at 828 m (2,717 ft).
The Burj Khalifa, originally the Burj Dubai, is a supertall  skyscraper in Dubai, United Arab Emirates.   As of its topping out in 2010, it is the world's tallest buildinâ¦g,  and at 828 meters tall (2717 feet) it is in fact the tallest  manmade structure in the world.