Also, Bowditch has perennial tables, which can be corrected

for the current date -  Or any date, for that matter.

No doubt there's a UK equivalent of Bowditch, the reference

nautical almanac in the US.
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.