 The increasing interest in sidemount diving configurations prompted several manufacturers and individuals to design and sell their own designs of a sidemount system.Hollis, OMS, UTD developed equipment, while Steve Bogaerts (a UK-born cave pioneer, who lives and dives in Mexico) released the popular minimalist 'Razor' system and began teaching a specific model training program for his rig.At this time, several technical scuba agencies developed formal sidemount training programs and incorporated sidemount diving configuration as an equipment option within existing technical diving programs.