Navigation Problems USCG Question #959 (Set 28)

You are steering 349°T, and a light is picked up dead ahead at a distance of 17.2 miles at 2122. You change course to pass the light 4.5 miles off abeam to port. If you are making 19.5 knots, what is your ETA at the position 4.5 miles off the light?

Official USCG Answer & Rule Citation

Correct Answer: Option D — 2213

Utilizing standard chartwork and piloting geometry, determine the direct distance along the hypotenuse using the initial range and required passing distance. Divide this distance by 19.5 knots to obtain elapsed steaming time, which translates to an ETA of 2213.

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