Many people have asked how I am doing my navigation on this trip. My iPhone can do live navigation (GPS) with Google maps. However, this function drains the battery very fast. This occurs even faster in the cold weather (as it true for all batteries). The navigation problems are compounded in big urban areas where you must make many turns. If you're on one road for 35 miles, you can periodically flip on the GPS to check your position; This is very energy efficient. However, in a city, you really need to have it on all the time for it to be of any use. The problem is that if you leave the GPS on nonstop in a big city, chances are its gonna die on you at some point. The way that I combat these challenges is that I create a set of directions and a map (using Google) with the route marked on it the night before the trip. I can open this map on my phone with Safari when I am riding. This saves much battery power as simply accessing the internet where the map is saved uses much less battery power than the live tracking function of the GPS. You do have to keep sliding the map along as you move, but it works fairly well in some but not all instances. First, since touch screen phones use heat to sense your finger (not pressure), it makes navigating with gloves on impossible; I have to take my glove off at least 50 times a day when navigating through big cities in the cold. Second, touch screens do not work when it is very cold (i.e. the first 10 days of my trip). Third, they function very poorly in the rain. My normal routine is to use the internet maps for a few hours, then switch on the GPS as I get closer to my destination.
It appears as though I left my computer charger in New York, so this it is for today. Oh, here's where I got the flat.