The correct answer is C) Both A and B. To determine if your vessel's position is in the dangerous or navigable semicircle of a hurricane, you need to: 1) Plot two or more recent storm positions from weather bulletins to track the hurricane's movement and forecast its future path. This allows you to assess whether your vessel is in the dangerous semicircle where winds and seas are more severe. 2) Observe whether the wind is veering (shifting clockwise) or backing (shifting counterclockwise). Winds in the dangerous semicircle of a hurricane will typically veer, while winds in the navigable semicircle will back. Both plotting recent storm positions and observing wind direction changes are necessary to accurately determine your vessel's position relative to the hurricane's dangerous and navigable semicircles.