The apparent wind is zero when which...

The apparent wind is zero when which...

Question 1 of 2707066636ee928f7522a1c51914b

The apparent wind is zero when which situation exists with the true wind?

Question 1 of 27070

Q

The apparent wind is zero when which situation exists with the true wind?

🔍 Key Concepts

• True wind vs. apparent wind (vector difference between actual wind and vessel’s motion) • Effect of a vessel’s speed and direction on the apparent wind felt onboard • What happens to apparent wind when the vessel’s motion cancels the true wind vector

💭 Think About

• Imagine you are standing on deck: from which direction and at what relative speed must the true wind blow so that you feel no wind at all? • Think in terms of vectors: the apparent wind is the true wind minus the ship’s motion through the air. Under what condition does that subtraction give a zero vector? • Compare each choice: in which case do the magnitude and direction of the ship’s motion and the true wind line up so that they exactly balance each other?

✅ Before You Answer

• Identify which options have the true wind and vessel motion in exactly the same line of action (either same or opposite direction). • Check in which option the speeds are equal, so they have a chance to cancel out. • Verify which situation would result in no relative airflow over the deck (nothing felt on your face if you stand still on deck).