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The Maryland Pilots have guided ships to and from Baltimore since the 1700's. They have been chartered as an organization since 1852. This is an edited except from films about the Pilots shot between 1950-1965 for the Port that Built a City and State. The original films are in the archives of the Baltimore Museum of Industry.
Another very good explanatory video by Knud Benedict. Absolutely worth seeing.
Yaw Stability is an important element of Ships Manoeuvrability - both for course keeping and turning ability. This first video in a series explains the Basic Principles of stability in steady state equilibrium conditions and the forces / moments involved