USCG Exam PracticeSingle-screw maneuvering and prop walk
When backing a single-screw vessel, what is the recommended first step before engaging astern power?
- A. Apply a short burst of ahead power to build discharge current across the rudder
- B. Reduce RPM to idle to minimize propeller side force before engaging reverse
- C. Center the rudder to minimize drag and allow propeller side force to act freely
- ✓ Apply full rudder toward the side that opposes the expected swing from propeller side forceCorrect
Why D is correct
The recommended sequence is to apply full rudder toward the side that opposes the expected swing before starting astern. This pre-positions the rudder to counter the swing that propeller side force will produce once sternway develops.