In the US, the leading cave rescue training curriculum is developed and deployed by the National Cave Rescue Commission (NCRC), which operates as part of the National Speleological Society (NSS). The NCRC is not an operational cave rescue unit, but the organization is composed of members of regional rescue squads. The NCRC offers training across the country in the form of two-day orientation classes as well as longer regional and national week-long training classes. The National Cave Rescue Operations and Management Seminar is a week-long class offering 4 different levels of training and is held in different locations around the country every year.