On a single-screw ship, moving astern with the propeller rotating counterclockwise, the bow will walk to which side?

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

On a single-screw ship, moving astern with the propeller rotating counterclockwise, the bow will walk to which side?

Propeller walk plus direction of travel determines how the hull yaws when you move astern. With a single screw turning counterclockwise as seen from the stern, the reverse thrust in astern sets up a swirl that pushes the stern toward the port side. As the stern moves to port, the hull pivots and the bow swings to the opposite side—toward starboard. So the bow will walk to starboard.

Propeller walk plus direction of travel determines how the hull yaws when you move astern. With a single screw turning counterclockwise as seen from the stern, the reverse thrust in astern sets up a swirl that pushes the stern toward the port side. As the stern moves to port, the hull pivots and the bow swings to the opposite side—toward starboard. So the bow will walk to starboard.

More practice questions