I recently discovered this product and find it very interesting but I'm little confused about different versions available on the market. I am from Europe so I'm looking at the expansys.co.uk. http://www.expansys.com/globalsat-gb-580p-cycling-computer-230468/
The link and packet contents mentions 580P but on title and description is 580B, which has less options. I want to know what is the actually product on that page.
I would also like to know if one of the models(probably 580P?) will fit my needs as I need some for of navigation. I understand there are 2 "modes": track backing and waypoints.
1. For trackback, can you upload to the device any GPX file, eg from bikemap.net and he will give you indications? Are there any restrictions on the GPX file to upload like size or maximum number of points? How does navigation work? Because the files can be created by logging positions every second.
2. Waypoints: this one seems more clear to me. Basically you create a route in some mapping software(which one works?) with of a limited number of waypoints(100 I found?) and an arrow will point to the next one. In this case, it depends on me to place the points strategically so I don't go off the route.
As a side note, I don't plan to use it specifically for navigation, like a car GPS. Most of the routes I follow are pretty straight but there are some junctions with other routes or roads or easy to miss tight turns. I don't need mapping because I take a map of the region with me every time. But it's not very handy to use it at every crossroad. Probably using the second functions, of waypoints, will be enough for me, placing one only at the junctions where I have to change directions. But I need to make sure I got the things correctly.
Another questions, when using the 2 mentioned navigation screens, can you display something else, like current speed or distance?
Thank you for your time.