1) David studied with the remaining navigators in the eastern Solomons and wrote this book. He also sailed with those navigators using the techniques described and also navigated from Hawaii to Tahiti on Hokule'a in, if I recall, 1976.

Google him. He is worth a look, having accomplished what British adventurers do best, adventure. Thirds on the Fisrt Transatlantic solo race with Hasler and Chistester and Howles. Circomnavigation attempt in Antarctica (Ice Bird) which nearly ended him. Eleven books and I think 5 National Geo Articles about him. His auto-biography, "Shapes on the Wind" appears to be online now for download. I highly recommend it.

2. Lunar sights. I did some at a desk and they are a pain in the %^&*.

3. Moon sights. They say you can't, but I disagree. On a very clear brigtly moonlit night you can take an upper limb of the moon and it will be sufficiently accurate to keep you off the bigger stones out there. Ten miles or so. I average 5 miles anyway, so . . . My experience is that the lower limb on a full moon night tends to washout both the margin and the horizen and results in a bigger error. But, you certainly can and it is fun.