Departure point, destination, boat speed, current weather and stream variances all play into what is going to happen.
Sure average recommendations help but a little here and a little there and suggestions can be quite different from the average or not matter at all...in either direction.
Much like a long trip on google maps...before you go to bed it tells you one route...in the morning because of traffic and accidents it reroutes you. Boating in weather, currents will definitely do that....but some routes are a bit more locked in than others.
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