This heavy lift concept might be a candidate for an asteroid tether catch:
http://www.astronautix.com/craft/bonaucer.htmI wonder if a magrail can work while submerged. We have seen cryogenics and the disk shaped pills of superconducting material levitate--so a cold LH2/LOX filled disk should be no different. Disks do not need landing gear per se for water recovery--as explained here
http://www.astronautix.com/craftfam/lenicles.htmAn asteroid could help in lifting such a saucer shaped
hab-ship from the surface...
Ringships and asteroids
http://tech.groups.yahoo.com/group/NEAmines/message/1212 http://www.asteroidmines.net/ http://tech.groups.yahoo.com/group/NEAmines/ http://forum.nasaspaceflight.com/forums/thread-view.asp?tid=10446&posts=21&start=1