Thanks to everybody for reply. I would like to ask you a bit more questions. I have seen different types of GPS on INTERNET. Some of them allow to have maps. I was wondering if any GPS can contain the map of whole world in 1:250 000 or 1: 1000 000 scale, not only specific regions and countries , or GPS do not have enough memory to contain it all?
And about Satellite Phones: would you know which phones would be water and shock proof and not bulky (without special case) and which satellite phone companies cover Eurasia, America, Africa and Australia?
Regards,