You cannot join the Airborne Hazards and Open Burn Pit Registry while on an eligible deployment. It may take up to 90-120 days after your return for your deployment information to be linked from DOD records to the registry. Therefore, the system may not recognize your eligibility if you are still deployed. We recommend waiting to register until at least 90 days following your return from deployment; this reduces the likelihood that you will need to request a manual eligibility review and possibly provide documentation supporting eligibility. It also enables to you to complete the questionnaire based on your full deployment experience by capturing your exposures and health concerns.