🔍 Key Concepts

• Use only the ACT6611 Buoy 10 (top) current prediction graph, not the Lower Town Creek graph below it • Determine whether the current is flood (positive values) or ebb (negative values) at 1630 on 11/09 • Match the sign of the current (flood/ebb) to the listed mean directions shown at the top of each graph (flood vs ebb directions)

💭 Think About

• On the Buoy 10 graph, is the curve above or below zero at 1630 on 11/09, and is it closer to 0.1 or 0.2 knots? • Once you know if it’s flooding or ebbing, which two answer choices can you immediately rule out based on direction alone? • Compare the graph’s scale on the vertical axis with the curve’s height at 1630—what approximate speed does that correspond to?

✅ Before You Answer

• Confirm you are reading local standard time (LST) along the bottom axis and are exactly at 11/09 16:30, between the 12:00 and 18:00 tick marks • Verify whether the current is positive (flood) or negative (ebb) to select the correct mean direction for that station • Check the speed scale on the left (in knots) and ensure your chosen answer’s speed (0.1 vs 0.2 kts) matches the graph’s value at that moment