Editing Mars Direct (section)

===Other Studies===

The Mars Society and Stanford studies retain the original two-vehicle mission profile of Mars Direct, but increase the crew size to six.

[[Mars Society Australia]] developed their own four-person ''Mars Oz'' reference mission, based on Mars Semi-Direct. This study uses horizontally landing, bent biconic shaped modules, and relies on solar power and chemical propulsion throughout,<ref>{{cite conference |first1=D. |last1=Willson  |first2=J.D.A. |last2=Clarke |title=A Practical Architecture for Exploration-Focused Manned Mars Missions Using Chemical Propulsion, Solar Power Generation and In-Situ Resource Utilisation |conference=Proceedings of the 6th Australian Space Science Conference |conference-url=http://www.nssa.com.au/6assc/downloads/6assc%20proceedings.pdf |pages=186–211 |location=Canberra |date=19–21 July 2006 |url=https://marssociety.org.au/sites/default/files/library/willson-et-al.pdf}}</ref> where Mars Direct and the DRMs used nuclear reactors for surface power and, in the case of the DRMs for propulsion as well. The Mars Oz reference mission also differs in assuming, based on space station experience, that spin gravity will not be required.