What are the first things to do in the event of a collision and entanglement with another jumper?

In the event of a collision and entanglement with another jumper, the first priority is to check altitude and establish communication. Assessing altitude is critical because knowing your height above ground will influence your immediate decisions and actions. If you are in a low altitude situation, you may not have enough time to try to fix the entanglement or employ other safety measures. Establishing communication with the other jumper is equally important to coordinate actions, as both jumpers can work together to assess their situation and determine the best course of action, especially if they are able to signal or communicate effectively.

This two-step assessment allows jumpers to make informed decisions, whether that involves attempting to untangle, managing the deployment of a reserve parachute, or signaling for help, depending on the specifics of their entanglement and altitude. The other options may come into play based on the outcomes of these initial steps, but the priority is to understand your situation first to enhance your chances of a safe resolution.