Why, you don't know enough to pilot a cow down the lane. USS Moosbrugger pulls into Penns Landing piloted by Captain Thomas L. Cluff, first class river pilot. Read the first 100 pages of Life on the Mississippi by Mark Twain and that's my job, except Twain worked on a single boat during the high water season and I work year 'round on different ships. International law requires local pilots to board vessels more than 100 feet long at the mouth of Delaware Bay and ensure they get safely to their berths.
River pilots are a powerful piece of the maritime mosaic.
In bad weather, they can refuse to board a ship, which in effect shuts the river down. The pilots group operates like a cooperative. One turn from the bay to Philadelphia takes seven to eight hours. Begin with a blank piece of paper. Draw the river from Cape May to Trenton to scale from memory, exactly like a commercial chart.