Question 4207 Deck General

The correct answer is D) full astern. When a vessel with a single propeller is put in full astern, the transverse force (also known as "propeller walk" or "thrust deformation") has the most significant effect on the vessel's handling. This is because the propeller's thrust is directed in the opposite direction, creating a strong sideways force that pulls the stern of the vessel in the direction of the propeller's rotation. This effect is most pronounced when the propeller is operating at full reverse thrust. The other options are incorrect because the transverse force is not as pronounced when the engine is in half ahead (A), full ahead (B), or slow astern (C) as it is in the full astern (D) position.