People say that the universe is infinite… say that it’s impossible to realize its size. But sometimes even the infinity has a place…a source of all wishes…and when such a source appears…then even the infinity becomes cramped. DUNE!
The infantry have always been the main force of the House Atreides, but not the machinery, especially now, when the fremens joined them; that is why there exist an acute need of quick displacing of forces. So it is the main function of transporter, besides, it contains a medical section in its configuration, and a medic is included to the crew as a compulsive member, in order to be able to deliver medical care.