https://youtu.be/qZbUXewlQDk?t=183
Discussion of port anchor drop - Sal spotted that in one of the daylight vids.
Before that he talks briefly about how an emergency backdown can throw the ship out of control. :-(
Discussion of port anchor drop - Sal spotted that in one of the daylight vids.
Before that he talks briefly about how an emergency backdown can throw the ship out of control. :-(
Most (but not all) single-screw ships have a "right-handed" propeller that turns cockwise when the ship is going ahead. Prop walk, also known as paddlewheel effect or asymmetric blade thrust, is the tendency of a propeller to push a boat’s stern sideways. This has a tendency of walking the stern continuously towards starboard (thus the bow to port) over time. A small bit of starboard rudder will counteract that port tendency.
Thus prop walk is most noticeable in reverse on single-screw vessels, and it can make close-quarters maneuvering, including docking, a daunting challenge. Backing hard on single-screw right-handed propeller while having appreciable headway will cause the stern to walk to port, and the bow towards starboard. This is especially true if steering control has been totally lost,