The best way to get started is to stop talking and start doing (Walt Disney)

So, let's go.
I will tackle the part I consider to be the hardest (maybe I’m wrong, who knows), and that’s the electronics part. It comprises both navigation and communications. For that purpose I found at SparkFun this kit to use the GM862-GPS chip. In two lines, the GM862-GPS is a communications chip (43 mm. each side) which is able to receive GPS signal. It has algo a built in Python interpreter (quite limited, though). I have some knowledge of Python, but I’ve never programmed a chip through the serial port. I printed a couple of the official manuals (the Hardware and Software User’s Manual) and I’ll try to figure out what can I do with that. It arrives this Friday, so till then I have some time to read the instructions (and prepare some exams, for September, too).