Test procedures were streamlined based on the experience in Operation Buffalo so that it took six hours to set up a tower test and eight for a balloon test. This allowed the testers to take advantage of transient but suitable weather conditions. Invitations to send observers were sent out to all nations with defence cooperation agreements with Britain, which included NATO countries, and fourteen accepted. Australia would send 24 observers, along with Beale's party of 20 parliamentarians. A media contingent of 20 was also accommodated.