I saw "Cast Away" last week, and had a question about sudials and the movie.
After Tom Hanks has spent several years on a desolate island, he constructs
an impressive analemma from a thin beam of light that enters his cave,
complete with days of the months. This would not be hard, if he had a
working watch, but I don't think he did. So, my question is, is this just
Hollywood chicanery, or is it really a possible thing to do? Bill G. (I
need to know, in case my plane goes down in the south Pacific some day).
