A single screw ship tends to the wind how?

Master the Navigation, Seamanship, and Shiphandling (NSS) – Officer of the Deck (OOD) Phase 2 Exam with engaging flashcards and multiple choice questions, complete with hints and explanations. Prepare comprehensively for your test!

Multiple Choice

A single screw ship tends to the wind how?

A single-propeller vessel has a yaw tendency that makes the stern swing toward the wind, so it tends to back into the wind. The propulsion is concentrated behind the hull’s center of resistance, and the propeller’s wash and thrust interact with the hull in a way that creates an unbalanced yaw moment. With neutral helm, this tends to rotate the ship so the stern faces the wind, i.e., the vessel backs into the wind. This effect is less pronounced with twin screws, where opposing thrusts help balance the yaw.

A single-propeller vessel has a yaw tendency that makes the stern swing toward the wind, so it tends to back into the wind. The propulsion is concentrated behind the hull’s center of resistance, and the propeller’s wash and thrust interact with the hull in a way that creates an unbalanced yaw moment. With neutral helm, this tends to rotate the ship so the stern faces the wind, i.e., the vessel backs into the wind. This effect is less pronounced with twin screws, where opposing thrusts help balance the yaw.

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