You wish to make good a course of 035°T...

Question 1 of 2921866636ee928f7522a1c51a73d

You wish to make good a course of 035°T while turning for an engine speed of 12 knots. The set is 340°T, and the drift is 2 knots. What speed will you make good along the track line?

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Question 1 of 29218

You wish to make good a course of 035°T while turning for an engine speed of 12 knots. The set is 340°T, and the drift is 2 knots. What speed will you make good along the track line?

🔍 Key Concepts

• Current set and drift vectors relative to your intended track • Using the current triangle / vector triangle with speed through the water vs. speed made good • Relationship between drift speed, ship’s speed, and angle between set and course

💭 Think About

• Sketch the vector triangle: one vector for your intended track (course made good), one for the current (set and drift), and one for your ship’s motion through the water. Which side of the triangle represents the speed you are solving for? • How big is the angle between the set (340°T) and the intended track (035°T)? Is the current mostly helping you along track, opposing you, or mostly sideways? • If your engine speed is 12 knots and the drift is 2 knots, should your speed along track be slightly less than 12, slightly more than 12, or a lot different? Why?

✅ Before You Answer

• Be clear which quantity is speed through the water (engine speed) and which is speed made good along track • Compute or estimate the component of the current along the 035°T track, not just its total magnitude • Double-check your angle: use the difference between the set and track directions, not between the set and heading through the water unless you’ve already solved for that heading