What is the function of a flyback chronograph on a wristwatch?

The flyback chronograph is a specialized feature found in certain chronograph watches that streamlines the process of timing events. Its primary function allows the user to activate the stop, return to zero, and restart the timing mechanism all with a single push of the chronograph button. This is particularly useful for timing consecutive events without having to stop and reset the chronograph manually each time.

This design enables the user to capture new time intervals quickly, making it preferred in professional settings where timing accuracy and efficiency are critical, such as in aviation and motorsports.

In contrast, some of the other functions mentioned in the options pertain to different capabilities that a chronograph may have, but they do not encapsulate the unique efficiency of the flyback function, which combines a series of actions into one. Thus, the feature of activating multiple timing functions with just one push is what clearly identifies the flyback chronograph from other types of timekeeping mechanisms.