🔍 Key Concepts

• Relationship between engine RPM, "turning for" speed, and speed made good through the water vs. over the ground • Effect of current on a vessel’s speed over the ground (SOG) compared to its speed through the water (STW) • Definition of slack water (no current)

💭 Think About

• If your engines are set for 10 knots, what is your speed through the water? How does that compare to the speed you are actually making good? • If the current were helping you or opposing you, would your speed made good be higher or lower than your through‑the‑water speed? • Which answer choice matches the situation where your speed made good equals the speed you are turning for?

✅ Before You Answer

• Be clear on the difference between speed through the water and speed over the ground • Think about whether a with‑current situation would increase or decrease your speed made good relative to what you are turning for • Verify that the described situation (10 knots turning, 10 knots made good) means there is no net effect from current or some positive/negative effect