Anyway, a team of researchers have decided to decode the science of breaching. They dropped decoy seals into the water to elicit 121 Great White strikes over a period of years. Using the data of how high the sharks jumped, they were able to calculate how fast they were moving.
That is to say, an 11.5-foot shark jumped 8 feet out of the water and caught air for more than a second. Doing the math, they estimated that the sharks got up to speed of almost 10 meters a second (or greater than 21 miles per hour)!
Most shark attacks on seals occurs where the bottom depth of the water was 26-30 meters. In those circumstances, the researchers calculated that the sharks would reach the seals in around 2, 2.5 seconds after they begin their strikes. That's not much time for a seal to get out of the way, which is one reason that the attacks have a 40 to 55 percent success rate, depending on the lighting conditions.