Recommendations Human External Cargo HEC Communication 30 Oct 2016 Air Rescue Commission - Recommendation 0010 - Human External Cargo HEC Communication (Issued 2003, Revised 2009 and 2016) Every HEC operation should be conducted with a proper two-way radio communication system. Downloads 20161031-AIR-REC0010 Human External Cargo HEC Communication (PDF) 139 KB Download