On 10 November 2023 at 2130, you are inbound...

Question 1 / 20673956e598d45f16831b6cf7

Question 1 of 20673956e598d45f16831b6cf7

On 10 November 2023 at 2130, you are inbound at Charleston Harbor Entrance Buoy “10” (ACT6611). Your vessel will transit 15nm and make good 12.5 knots to a berth where the nearest tidal current station is ACT6706. What will be the direction and velocity of the current as you approach the dock? Illustration D058NG

Back

Question 1 of 20

673956e598d45f16831b6cf7

No comments yet

Be the first to share your thoughts!

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

🔍 Key Concepts

• Use the Speed = Distance / Time formula to find how long it takes to go 15 nm at 12.5 knots. • Identify which tide current station (ACT6611 vs ACT6706) applies "as you approach the dock". • From the current graph, decide if the current at your ETA is flood (positive) or ebb (negative), then match that to the mean flood/ebb directions printed on the chart.

💭 Think About

• First, compute your ETA at the berth starting from 2130 using your transit time. What clock time do you get? • On the lower graph (ACT6706), at that ETA, is the curve above or below the zero line, and roughly how strong (in knots) does it look? • Once you know whether it is flood or ebb and the approximate speed, which choice has both a matching magnitude and a direction consistent with flood or ebb at ACT6706?

✅ Before You Answer

• Be sure you are reading the ACT6706 (Lower Town Creek Reach) graph for conditions at the berth, not ACT6611. • Confirm the ETA falls on 10 November and read the correct side of the time axis (make sure you’re not on 9 Nov or 11 Nov). • Match the sign of the current (flood vs ebb) to the printed Mean Flood Dir 335°(T) or Mean Ebb Dir 172°(T) at ACT6706 before selecting a choice.

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

Quick actions

— No credit card needed

Question 1 of 20

2.0kts at 172°T

0.4kts at 104°T

0.4kts at 280°T

2.0kts at 335°T

Loading interactive features...

Question 1 / 20673956e598d45f16831b6cf7

Question 1 of 20673956e598d45f16831b6cf7

Back

Question 1 of 20

673956e598d45f16831b6cf7

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