Geostationary satellites have a limitation of use in latitude, generally 70 degrees north of the equator to 70 degrees south of the equator.

In comparison, due to limitations of using solid nuclear fuel and water as coolant, current generation of nuclear plants average only about 35% conversion efficiency.

Topologically these chains can be unknotted, but the limitation of using only rigid motions of the segments can create nontrivial knots in such a chain.