Which is the BEST way for a twin-screw...

Question 1 / 2066636ee728f7522a1c51759f

Question 1 of 2066636ee728f7522a1c51759f

Which is the BEST way for a twin-screw vessel to clear the inboard propeller and maneuver off a pier?

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Question 1 of 20

66636ee728f7522a1c51759f

Which is the BEST way for a twin-screw vessel to clear the inboard propeller and maneuver off a pier?

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🔍 Key Concepts

• Twin-screw maneuvering: How inboard vs. outboard propellers affect movement when alongside a pier • Spring lines: Difference between a forward‑spring and after‑spring and what each does to the vessel’s pivot point • Propeller wash and suction near the pier: Which propeller you most want to keep clear of the pier to avoid damage or sucking the stern in

💭 Think About

• Think about which line (forward‑spring or after‑spring) will let the stern swing away from the pier when an engine is used against it • Ask yourself: if the inboard propeller is the one closest to the pier, which engine (inboard or outboard) should be turning to move the stern out without risking contact? • Consider how using just one engine (inboard vs. outboard) changes the turning moment around the spring line and how that helps clear the inboard screw

✅ Before You Answer

• Identify clearly which propeller is inboard (closest to the pier) and which is outboard (away from the pier) in this situation • Determine what effect a forward-spring has when you go slow ahead on an engine: what part of the vessel moves, bow or stern? • Verify which option uses an engine that is away from the pier while the line used holds the bow in and lets the stern swing clear

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Question 1 of 20

Which is the BEST way for a twin-screw vessel to clear the inboard propeller and maneuver off a pier?

Hold the forward-spring line and go slow ahead on both engines

Hold the after-spring line and go slow astern on the outboard engine

Hold the forward-spring line and go slow ahead on the inboard engine

Hold the forward-spring line and go slow ahead on the outboard engine

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Question 1 / 2066636ee728f7522a1c51759f

Question 1 of 2066636ee728f7522a1c51759f

Which is the BEST way for a twin-screw vessel to clear the inboard propeller and maneuver off a pier?

Back

Question 1 of 20

66636ee728f7522a1c51759f

Which is the BEST way for a twin-screw vessel to clear the inboard propeller and maneuver off a pier?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed