The top blade movement is toward the ______.

Prepare for the Boat Crewman Test with flashcards and multiple choice questions, complete with hints and explanations for each question. Ace your exam!

Multiple Choice

The top blade movement is toward the ______.

Explanation:
When a propeller spins, every point on a blade traces a circular path. The topmost point moves along the tangent in the direction of rotation. With a standard boat propeller, viewed from the stern, the rotation is clockwise, so the top blade’s instantaneous motion is toward the outboard side of the boat. Inboard would mean toward the centerline, and upward or downward describe vertical movement, not the horizontal sweep of the blade. So the top blade moves toward outboard.

When a propeller spins, every point on a blade traces a circular path. The topmost point moves along the tangent in the direction of rotation. With a standard boat propeller, viewed from the stern, the rotation is clockwise, so the top blade’s instantaneous motion is toward the outboard side of the boat. Inboard would mean toward the centerline, and upward or downward describe vertical movement, not the horizontal sweep of the blade. So the top blade moves toward outboard.

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