There must also be a memorandum of understanding between the tasking agency and the air operator in order to ensure a good working relationship.
[2][3] HFRS refers to the particular set of equipment approved by regulatory authority and sold as an integrated package or kit, suitable for use on a specific helicopter models and configurations.
Both systems provide a second attachment point that can be released by the pilot (or assistant on board) in the event of a bona fide emergency requiring the jettisoning of the load.
A similar technique is used by linemen when constructing or maintaining power lines,[4] and by maritime pilots between ship and shore.
[8] The system has proved to be safe, and cost effective, and now constitutes part of the search and rescue safety plans within the province of BC, with over 15 teams currently using the technique.