Ship engine speed.

[Guest]

Many variables.ship size, engine type, loaded , mt, etc

[Lukas M]

Watching the ships glide down the St Clair River on the Port Huron Web. Cam. got me to wondering at what speed would the ships engines be operating ? Must be a very low setting as the ship glides along with the currant. Going upstream the engines must be working much harder. Maybe Ahead Two Thirds or something like that ?