SWmud is unique for its space system.

Here you can fly ships, launch and land them from planets, kill monster ships for experience and salvage their debris for credits. The space system is three-dimensional, similar to a cartesian coordinate system. You can see other objects in space by their distance and position relative to you in x,y,z coordinates.

A few basic commands to learn how to fly are:

You should probably practice flying around for a while to get used to the vector system and to learn how to avoid crashing into planets and other ships before attempting to go into space combat.