Just to introduce myself. Have started to walk a lot more this year to the point where I can easily walk 8 miles. Not a lot for many in this forum i would imagine but for me quite an achievement! I want to go on a walking holiday on my own to naxos in Greece next year. I have bought a book of walks in naxos. it has long numbers for the walk directions that begin with N or E. I would imagine these are longitudinal and latitudinal numbers? Does anybody know of a device i could buy that could find these numbers while I was walking?