You are underway on course 120°T and your maximum speed is 12 knots. The eye of a hurricane bears 150°T, 120 miles from your position. The hurricane is moving towards 295°T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?

Question

You are underway on course 120&deg;T and your maximum speed is 12 knots. The eye of a hurricane bears 150&deg;T, 120 miles from your position. The hurricane is moving towards 295&deg;T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?

Accepted Answer

Option D: 117 miles. Applying vector relative motion principles from Bowditch, maximum Closest Point of Approach (CPA) against a translating tropical storm is achieved by determining the relative movement line and vector triangle limits based on own-vessel maximum operational speed of 12 knots.

You are underway on course 120&deg;T and your maximum speed is 12 knots. The eye of a hurricane bears 150&deg;T, 120 miles from your position. The hurricane is moving towards 295&deg;T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?

You are underway on course 120°T and your maximum speed is 12 knots. The eye of a hurricane bears 150°T, 120 miles from your position. The hurricane is moving towards 295°T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?