Final answer:
The AERP tear away pull knobs should be positioned on the front of the wearer's vest or harness, easily reachable and unobstructed, to ensure quick access in an emergency.
Step-by-step explanation:
The AERP (Aviation Emergency Rebreather Pack) tear away pull knobs need to be properly positioned during wear to ensure quick and efficient access in an emergency situation.
For optimum safety, these pull knobs should be positioned where they can be easily reached by the wearer. Generally, this would be on the front of one's vest or harness, within the field of view and reach. It's critical that the pull knobs are not obstructed and that the wearer has practiced accessing them, so they can be engaged rapidly and with little difficulty in the case of an emergency.
The proper positioning and accessibility of these knobs can be the difference between a successful deployment of safety equipment and a potentially dangerous delay.