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 Taipei 101 Tower. Measuring 509 meters (1,670 feet) tall, the Taipei 101 Tower in Taipei, Taiwan is widely considered the world's fourth tallest building. But, like the Burj Dubai, the Taipei 101 Tower gets much of its height from a huge spire.