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The nose cap of each booster is jettisoned at an altitude of 2.9 statute miles (2.5 nautical miles/4.6 kilometers) and deploys the pilot parachute. The pilot parachute immediately deploys the drogue parachute which is attached to the top of the frustum, the cone-shaped structure at the forward end of the booster.
At an altitude of 1.3 statute miles (1.1 nautical miles/2.1 kilometers), the frustums separate from the boosters. This releases three main parachutes housed within the frustums. It is these chutes that will quickly slow the booster's speed from 230 miles per hour (370.1 kilometers an hour) to a speed of 51 miles per hour (82.1 kilometers per hour). At approximately seven minutes after liftoff, the boosters will impact the Atlantic Ocean.
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