Good Evening. Later this year i will attempta trip Kayaking in the sea solo from Land's End to John O Groats raing money for BLESMA, Combat Stress & H4H. I have my route sorted, various Marine Charts & compass etc & tidal calulations ready to go. I am after a portable Marine GPS with loaded charts etc, i have looked on the internet and there are afew, but none that have great reviews. Any ideas?