this is where people try to make long range contacts via voice or morse code or even digital modes... there are a lot of forms of competing, some consider getting two way communication with each state or country on a continent, or a rare island. some compete with the most number of two way communications in a single session. some try to get contacts with exotic places like remote islands where a radio person has set up a temporary station. there are many forms to this! some try to get the largest distance with the lowest power, etc. i'm not into it myself, but it is a unifying activity and something to do with the airwaves that can be fun.