Description taken from Arcade version of this game

Billed as a "totally new concept in video skill games," Atari's Skydiver has you trying to safely jump from an airplane soaring across the top of the screen. Keeping an eye on the airplane's speed, you'll decide when to jump, how long to fall, and when to deploy your parachute, with the goal of hitting a landing platform randomly positioned at the bottom of the screen. The longer you wait to pull the ripcord, the smaller the platform will get and the more points you'll earn for a successful landing. Varying wind direction adds to the challenge. The game ends after a certain number of failed attempts, from three to six, depending on the arcade cabinet's settings. ~ Scott Alan Marriott, All Game Guide