- "Take grav-tube down 53B to level 4! Exit to cargo-tube ZZ8!"
- ―Instructions to Luke Skywalker
A grav tube was a means of personnel conveyance between decks aboard starships. By manipulating a microgravity control, a user would adjust the gravity within the tube, enabling them to float up or down to reach another deck. The M-class Imperial Attack Transport used grav tubes. Grav tubes were also used in multi-level cities on planets like Vorzyd V to travel between levels.