What does the 'check of threes' involve?

The 'check of threes' specifically involves checking three key points of equipment and harness before a jump to ensure safety and readiness. This pre-jump procedure emphasizes the importance of verifying that essential components are properly secured and functioning to minimize risks during the jump. Typically, the three points include the main parachute, reserve parachute, and the harness, which are critical for the safety of the jumper. By ensuring that these elements are correctly in place, a jumper can have increased confidence in their equipment, leading to a safer and more controlled jump experience.