Ham radio, also known as amateur radio, has proven to be the most reliable form of communication during emergencies when other systems fail or become overwhelmed. Ham radio operators can communicate directly with each other without relying on infrastructure by selecting the right frequencies to connect across town or around the world. Ham radio is a hobby enjoyed by over 2.5 million licensed operators worldwide who use various technologies to communicate voice, data, and images for personal enjoyment, public service, experimentation, and emergency communication when other systems fail during disasters.