Final answer:
NASA uses mathematical algorithms and satellite imagery to calculate the landing zone in the ocean.
Step-by-step explanation:
NASA calculates the landing zone in the ocean using a combination of mathematical algorithms and satellite imagery. Mathematical algorithms are used to calculate the trajectory and landing position based on factors such as the spacecraft's velocity, angle of entry, and atmospheric conditions. Satellite imagery is then used to visually track and verify the landing precise location. Together, these methods enable NASA to accurately determine the landing zone in the ocean.