A transporter is used for a trip between two planets which aren’t far apart.  It reminds me of a lift – a metal room about 2¼ metres long, 2 metres wide, and 2¼ metres high.  You go in, close the door, and order,  “Operate.”  A twist in your stomach shows the transporter has worked.  You order the door to open, and go out, onto the other planet.

Transporters take their passengers through 5D.