80 days. Good bio for a polar explorer [0] plenty of pre-planning and contingency for exfil.<p>[0] <a href="http:&#x2F;&#x2F;shackletonsolo.org&#x2F;bio&#x2F;" rel="nofollow">http:&#x2F;&#x2F;shackletonsolo.org&#x2F;bio&#x2F;</a>