🔍 Key Concepts

• Rotary current behavior around Nantucket Shoals (how set/drift change with wind) • Effect of a strong, steady wind on both the direction (set) and speed (drift) of current • How wind from the south tends to deflect surface currents in the Northern Hemisphere

💭 Think About

• Compare each choice’s set with the predicted 225°. Which options are downwind, upwind, or roughly cross-wind from the southerly wind? • Think about whether a strong southerly wind is more likely to increase or decrease the drift compared to the predicted 0.8 knot, and in which quadrant the new set will fall. • Ask yourself: is the wind pushing the surface water with, against, or across the natural rotary current, and how would that affect both direction and speed?

✅ Before You Answer

• Verify which answer choices show a clockwise or counterclockwise change in set relative to 225° and decide which is physically reasonable for a southerly wind in that area. • Check which options have a higher drift than 0.8 knot and which have a lower drift, and match that to your expectation for a 23‑mph wind. • Confirm that your selected option shows a set that is plausibly shifted from 225° in the direction you would expect the wind to push the surface current.