Just to be 100% accurate, fetch is a measure of distance, not time. Of course that can be translated to time = fetch / wind velocity.
But willi is right, longer fetch equals a longer time for the wind to transfer scary amounts of energy into a steadily building wave state. Being at the end of a long fetch with a steady wind can be bad medicine...
1 Canoe/Kayak Trailer
Gedi Convertible Helmet
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