Originally Posted by Flanker1964
The only other option would be a waterproof housing for my iPhone I have seen some that bickers use on there handlebars.
iPhone is fine as a backup, but their are issues you have to worry about that are just minor inconveniences to a Biker:
- battery dead (charging risks the water tight integrity of the box)
- lost signal meaning the app stops showing maps (some do some don't)
- bright sunlight stops the screen being viewable.
So if you "NEED" a chart plotter you don't want to be relying on a phone. Hence my earlier questions.