Admittedly this is mostly to settle a bet between me and a former EVE-player mate of mine, but maybe it'll spark some interesting discussion too, so, here we go. >>
I've read through plenty of chrons that describe experiences within the pod, without the pod, what the pod does, what the pod is/is not, long-lasting effects of the pod. What I can't find any info on (potentially because of my low reading comprehension, but that's a different matter), is just how long an individual could stay within the pod, in a ship, in k-space.
I assume there must be a variety of factors that would come into play. It wouldn't so much be a question of when the pilot would get too tired, but eventually, ammunition would run dry, crews would diminish in capability, life support systems would run out. The size of the vessel would contribute to the time limits, just as real-world naval vessels are limited by certain factors, including even their function, such as submarines.
But suffice to say, if a pilot were to be aboard a basic ship hull -for the sake of argument, something small enough that a crew wouldn't be required, a frigate hull of some type - with working life support systems and all integral components are optimal performance, just how long could they remain adrift? A matter of weeks? Months? Half a year?