How long to row 7300 miles?

This is for a fictional piece of work. There's a crew of 20, they are travelling in a boat similar to a Viking longboat or a Native American canoe. I'm going to put various stops along the way, but how much rowing time would be needed to achieve this for an average trip, I'll put a few storms into the plot, how much would these slow rowing times down by? I'm thinking somewhere around 700-800 hours, am I anywhere near close? Cheers to anyone who can help.
Asked Dec 01, 2013

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