Talk:World Anchor/@comment-76.124.126.215-20120702164042/@comment-98.213.166.161-20120704021142

http://www.mod-buildcraft.com/forums/topic/world-anchor-vs-teleport-tether/ Second comment says 9 chunks so I misquoted.

http://railcraft.wikispaces.com/World+Anchor+%28Device%29 The official maker says a 3x3 square.

I think the tether only loads one but I'm not sure. There is a major cost difference for sure.