You observe a V-shaped ripple with the point...

You observe a V-shaped ripple with the point...

Question 1 of 3104866636ee728f7522a1c518257

You observe a V-shaped ripple with the point of the V pointing upstream in a river. What may this indicate?

Question 1 of 31048

Q

You observe a V-shaped ripple with the point of the V pointing upstream in a river. What may this indicate?

🔍 Key Concepts

• V-shaped ripples / eddies in current and what creates them • How current interacts with objects just below the surface • Difference between “dangerous to navigation” and “not dangerous” in chart and exam terminology

💭 Think About

• Think about what kind of object just under the surface would cause the current to split and form a clear V pointing upstream. • Ask yourself which of the listed objects is most likely to be very close to the surface with current flowing strongly over it. • Consider whether the exam is asking about a very specific cause of this V‑shape, or whether several different obstructions could create the same surface pattern.

✅ Before You Answer

• Be clear on what a towed‑under buoy is and how the current or towline would affect its depth and surface appearance. • Consider which objects are fixed on the bottom versus which might be held near the surface by a line or chain. • Verify whether the V‑shaped ripple is more closely associated with a single obstruction type or can reasonably result from any shallow obstruction in a flowing river.