The World Anchor is a machine from the Railcraft mod. This machine acts as a chunk loader, and will keep a 3x3 of chunks around it loaded. The World Anchor runs on Ender Pearls as a fuel source. By default, one pearl will allow the World Anchor to keep chunks loaded for 12 real-time hours. The World Anchor will remember how many hours it has left to load chunks, even if it is broken and replaced. This chunk loader can be turned off at any time via Redstone signal.