During the first century ravens or crows were often taken on board "Viking Knarr's," to be released thinking that they would fly in the direction of land. The lookout would observe the direction the birds flew in, so that the navigator could follow their course. Since the crow's nest is high from the vessel's center of gravity it is subject to violent motion in relatively calm or moderate seas. Any amount of movement of the ship is amplified, causing even seasoned sailors to become sea-sick. Therefore, being sent to the crow's nest was certainly not for everyone
( Captain Hank Bracker "Seawater )
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