The Panama canal has locks for a reason.
The ancient Greeks who ruled Egypt did not dig a canal because they thought the rise or maybe drop from the Red Sea to the Mediterranean was greater than it actually was.
Their measurements were a few feet off.
“The Panama canal has locks for a reason.”
The locks raise the ships up steps at a time so they can cross the land area, and then lowers them again to sea level, which is the same on both sides.
And what do you believe that reason to be?