The round ships with oars that were used for Mediterranean sailing were not useful in the rougher Atlantic waters and the maneuverable Viking Longships lacked cargo capacity and could not use their sails against the wind.
The round ships with oars were not useful in the rougher Atlantic waters. These oars were used for Mediterranean sailing. The maneuverable Viking Longships lacked cargo capacity. The maneuverable Viking Longships could not use their sails against the wind.