best sat nav for bicycles?
I am wanting to do a round the world bicycle trip and am looking at sat nav options. The problem is most of the bicycle specific sat nav options have many features I don't require. They tend to be marketed for health / fitness and include features such as calaries burned, training plans, heart rate, cadence etc. Also they tend to be marketed just for Europe / America. In my case I just want a simple sat nav for mapping / directions with world coverage. This is what I require:
1) GPS and Glonass support
2) Waterproof
3) Decent battery life and ability to charge from dynamo
4) World map coverage
5) Ability to load your own free maps such as OSM
6) support for offload use, such as mountain trails / canal paths
7) On the fly routing
8) easy read screen in sunlight
I have read other threads suggesting smartphones, however I have never owned a smartphone and have no desire to purchase one. Plus the majority of phones are not waterproof and are awkward to see in sunlight and often have poor battery life.
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