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He never mentioned using it on the water. Have you never checked tides, weather, surf, etc. before heading out? I rarely use on the water but the other day we were expecting some isolated storm cells but didn't want miss out so I was able to verify on the water a large storm cell we saw wasn't heading our way and we kept playing.
I like Runkeeper. Start it when you put in and stop it when you take out. It will record your distance, speed, and track. It gives you a graph of speed over distance, and you can compare it to the map and your memory of wind and current conditions. When you are finished, you save your trip. It will display your track on a map. It uploads your trip data to Runkeeper's internet site, and you can share the link with others. It builds a whole library with all your trips.
I think it is a cool app.
I use several apps on my iPhone for paddling including:
Navionics US and Canada charts
- excellent charting program that contains charts for oceans and lakes. Invaluable when trip planning. This is a pay app -- I think it was around $20 but is an incredible value considering what you get.
Google Earth (free)
- awesome for trip planning -- especially when you're looking for a good beach to stop at.
- standard tide information.
- a free app that allows me to know what ships and commercial vessels are in a specific area.
- a free app that shows planets and stars -- very cool as it moves as you turn giving real time locations of celestial objects. Nice to have while in a campsite after dark.
- instructions for all kinds of knot tying.
Peterson Birds of North America (around $15)
- an excellent resource if you're into identifying birds.
I know there are a few more on my phone that I use but the above are the ones that I reference most often for paddling purposes.
We had a similar discussion on WestCoastPaddler a while back -- you might find more interesting info there:
Hope this helps.