What does the term "hot swap" refer to in rocket recovery systems?

The term "hot swap" in the context of rocket recovery systems specifically refers to the deployment of a secondary recovery system after the primary recovery system has failed. This is an important feature in recovery systems, as it enhances the chances of successfully recovering the rocket.

In rocketry, the primary recovery system, often a parachute, is designed to safely bring the rocket back to the ground after its flight. However, if this primary system fails to deploy or malfunctions during descent, having a secondary recovery system that can be activated ensures that the rocket can still be recovered. This redundancy is crucial for minimizing loss and maximizing the chances for subsequent launches or recovery efforts.

Other options do not accurately reflect the definition of "hot swap." A rapid refueling process, launching multiple times in succession, and storing the rocket safely do not involve the concept of replacing or activating a backup recovery system in response to failure, which is central to the term's meaning in rocketry.