The process essentially involves making sure that the nozzles are the proper distance from the platform by twisting a series of screws.

ENGADGET: MakerBot Replicator impressions: the dawning of 3D printers in every home?

The paper said the majority of errors involved failing to keep proper distance between planes on the ground and in the air.

CNN: 747 cargo plane clips commuter jet while taxiing in Chicago

Every visitor to the Antarctic continent gets a lecture on dos and don'ts, like keeping proper distance from wildlife, and making sure to avoid even accidental littering.

FORBES: Go with the Floe

They not only had to wait until the space station steered into the proper lane for the Soyuz, but they had to pick a time when the distance between the station and the Soyuz once the Soyuz reached orbit was at a minimum.

FORBES: How Astronauts Got From Kazakhstan To The Space Station In Six Hours