You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from your position. The hurricane is moving towards 270°T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA?

Question

You are underway on course 050&deg;T and your maximum speed is 11 knots. The eye of a hurricane bears 070&deg;T, 80 miles from your position. The hurricane is moving towards 270&deg;T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA?

Accepted Answer

Option A: 66 miles. Constructing the relative motion triangle for tropical storm avoidance per Bowditch guidelines, maneuvering at 11 knots against a hurricane bearing 070T at 80 miles moving toward 270T at 19 knots allows a maximum attainable closest point of approach (CPA) of 66 miles.

You are underway on course 050&deg;T and your maximum speed is 11 knots. The eye of a hurricane bears 070&deg;T, 80 miles from your position. The hurricane is moving towards 270&deg;T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA?

You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from your position. The hurricane is moving towards 270°T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA?