Your twin-screw vessel is moving ASTERN with...

Question 1 / 2707066636ef128f7522a1c522d7c

Question 1 of 2707066636ef128f7522a1c522d7c

Your twin-screw vessel is moving ASTERN with rudders amidships. The starboard screw suddenly stops turning. How will your vessel respond?

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Question 1 of 27070

Your twin-screw vessel is moving ASTERN with rudders amidships. The starboard screw suddenly stops turning. How will your vessel respond?

🔍 Key Concepts

• Effect of a single working propeller when a twin-screw vessel is moving astern • Transverse thrust (sideways push) of a right-hand vs left-hand propeller when going astern • Difference between what the stern does and how that motion makes the bow appear to move

💭 Think About

• First decide: when only the port screw is turning astern and the rudders are amidships, which way will the STERN tend to move due to transverse thrust? • Once the stern moves that way, which direction must the BOW appear to move around the vessel’s pivot point? • Ask yourself whether the bow can really "remain stationary" if thrust is being applied on only one side while moving astern.

✅ Before You Answer

• Identify which screw (port or starboard) is still turning and in which direction (ahead or astern) • Recall the usual transverse thrust directions for right-hand and left-hand propellers when going astern • Visualize the vessel pivoting: if the stern is pulled one way, the bow must swing the opposite way

Question 1 of 27070

Your twin-screw vessel is moving ASTERN with rudders amidships. The starboard screw suddenly stops turning. How will your vessel respond?

The bow will go to starboard

The bow will remain stationary

The bow will swing from port to starboard

The bow will go to port

Question 1 / 2707066636ef128f7522a1c522d7c

Question 1 of 2707066636ef128f7522a1c522d7c

Your twin-screw vessel is moving ASTERN with rudders amidships. The starboard screw suddenly stops turning. How will your vessel respond?

Back

Question 1 of 27070

Your twin-screw vessel is moving ASTERN with rudders amidships. The starboard screw suddenly stops turning. How will your vessel respond?