Uberman for Ubermensch only?
My son sent me the abstract at the bottom.
Note the part in bold. Apparently among the sailors that Claudio Stampi? studied, 2 hours was not a regular practice. "Mean sleep among the sailors was 6.3 hours and best performance was 4.5 to 5.5 hours."
I have never done long distance solo sailing, but have read about it. Even with automatic steering systems, the sails must be constantly trimmed to adjust for changing wind conditions.
Perhaps the successful pattern wouldn't be Uberman. Rather a pattern where the nap would be repeated as often as needed especially at night to get enough sleep but never more than 20 minutes. Only rare indivicuals can get by on 2 hours of sleep a day. Never sleeping more than 20 minutes at a time may allow for considerable reduction in total sleep time and a sustainable life.
I remember reading Farley Mowat's book, Never Cry Wolf. This was the first advocacy of Polyphasic sleep I've seen. He copied the sleep habits of the Arctic Wolves. Even when they slept for longer total periods, they would only sleep for 10-15 minutes before getting up and shifting around. I found this quote: "Farley is fascinated by the sleeping patterns of the wolves, who take ten minute naps, and then get up, turn around and take another nap. He mimics this process and becomes proficient at wolf napping." (quote is from the Never cry Wolf study guide chapter 9 ... couldn't find the book) I only found one other ref for this book on the forum.
When he was studying the wolves he resorted to the same pattern so that he could observe them when they were awake. He found it so useful that he continued it after returning to civilization.
Farley Mowat claimed that he liked his new sleep habits so well that he continued them after he returned to civilization. As I understand it, he would sleep briefly, then wake up and move around without necessarily getting out of bed. I don't have any evidence as to whether he kept it up for life. He is 87 now in spite of being a hard living type.
He did say that he slept with a women whom he was planning to marry. She said she would rather spend her life with a bow-legged grasshopper than spend one more night with him!
This pattern should be called Wolf Napping as this is what Farley called it.
I was never a proficient napper so never really gave it a try.
TruthHunter
Abstract
In situations where continuous prolonged work demands exist, the habitual nocturnal monophasic (6-8h duration) sleep pattern can rarely be accomplished, and performance effectiveness may sometimes be severely compromised by accumulation of sleep debt. Several studies have shown that naps can be disproportionately effective in recovering functioning during continuous work (CW).
In this study, sleep-wake patterns and their relationship to performance were studied for 99 sailors involved in solo and double-handed ocean sailing races (a model of a highly demanding CW situation). Most sailors spontaneously adopted multiple nap sleep-wake schedules and adapted without major difficulties to such polyphasic patterns. 66.5% had mean sleep episode durations (SEDs) ranging from 20 min to 2h. Overall mean Total Sleep Time (TST) per 24h was reduced from a baseline of 7.5 to 6.3h. Race performance correlated negatively and significantly with mean SEDs and TSTs. Best performance results were obtained by those sleeping for periods of between 20 min and 1 h and for a total of 4.5 to 5.5h of sleep per day.
The results are discussed together with several chronobiological, phylogenetic and experimental studies and issues, all of which suggest that adult humans may have a damped polyphasic sleep-wake tendency. It is also proposed that polyphasic sleep schedules could become promising and feasible solutions for the management of sleep requirements under prolonged CW situations.