2. The verb "viking" is used to describe a temporary lifestyle. While most Norsemen lived in villages throughout their entire lives, some young and adventurous farmers would go "viking" (raiding) for months, others for years, to earn a living from piracy. Therefore, all Vikings were Norse, but not all Norsemen were Vikings.
In this particular case, Bob and Frank are leaving St. Augustine, FL, and sailing South, rounding the tip, cruising along the Keys, then finally heading out onto the deep blue by turning the corner at Key West and pointing Northwest toward New Orleans.