What is the second time warning communicated before a jump?

The second time warning communicated before a jump is 1 minute. This warning signifies that jumpers should finalize their preparations and be ready to execute the jump sequence imminently. At this point, jumpers typically conduct last-minute checks on their equipment and ensure that they are in the correct position.

The time warning system is structured to give jumpers adequate time to prepare, and the 1-minute call is critical as it indicates that the jump is approaching imminent execution. It helps maintain an organized and timely jump sequence, reducing confusion and enhancing overall safety in the jumping procedure.

In this context, the other options—30 seconds, 5 minutes, and 10 minutes—do not represent the second time warning. Instead, they are associated with different points in the timeline of pre-jump preparations, highlighting the importance of precise communication at various stages leading up to the jump.