How does the current affect the underwater body of the boat, in general?

How does the current affect the underwater body of the boat, in general?

• A. It moves the underwater body in the opposite direction to the current
• B. It moves the underwater body in the same direction as the current
• C. It does not affect the underwater body
• D. It only affects top side above water

Answer: (B)

When water is moving, it acts on anything submerged in it. The underwater parts of the hull experience drag and pressure forces in the direction the water is flowing. That creates a net push downstream, so the submerged portion of the boat tends to move with the current rather than against it. The effect grows with faster current, larger submerged area, and greater immersion. The top above-water area is influenced more by wind and air, but the submerged hull is carried along by the water itself, in the same direction as the current.

When water is moving, it acts on anything submerged in it. The underwater parts of the hull experience drag and pressure forces in the direction the water is flowing. That creates a net push downstream, so the submerged portion of the boat tends to move with the current rather than against it. The effect grows with faster current, larger submerged area, and greater immersion. The top above-water area is influenced more by wind and air, but the submerged hull is carried along by the water itself, in the same direction as the current.