![](https://sailforscience.com/wp-content/uploads/2022/07/ISH_8847-1024x684.jpg)
Navigation on the St.Lawrence River requires not only knowledge of navigation and helmsmanship in difficult river conditions with a current of up to 5 knots, but also endurance when a huge vessel passes by you in the narrow channel of the Seaway, specially built in 1959 for the passage of ocean vessels to the Great Lakes.