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Real-Life Math

Ship captains need to have a pretty strong understanding of math to understand the basics of navigation. Capt. Ann Sanborn is a professor at the United States Merchant Marine Academy. She says the school looks for applicants who have taken algebra and trigonometry in high school.

Whether they become a deck officer or ship engineer, a person must be comfortable with math, says Sanborn. "Math is needed for navigation, piloting the ship -- it has very practical applications. Math is involved in the stability of the vessel -- why is it floating or upright?"

Before you can get a captain's license, you will have to prove your math skills. Captains calculate the speed they need to maintain (known as knots) to project times of arrival into port cities.

At 8 p.m., you are 46 miles from your port city. You want to arrive there in 2.5 hours. What is the speed you need to maintain in knots per hour? Use the following to convert to knots: 1 mph = 0.869 knots per hour

Speed = Distance / Time