Kune Do trapping and entering techniques to enhance transitions into Combat Hapkido's core joint locking and throwing techniques. Combat Hapkido's core techniques rely heavily on the traditional Hapkido techniques that the ICHF determined to have the most practical applications for their goal of modern self-defense. The core curriculum has been organized into 10 basic levels or ranks and extensive reference materials, including a complete video reference library, are provided to schools and individual students through the ICHF Headquarters in Fernandina Beach, Florida. All training in Combat Hapkido is reinforced with extensive training seminars, with most months containing multiple seminars located throughout the United States and Internationally. In addition to the core curriculum, the ICHF researches and develops "modules" that are compatible with the core curriculum and encourages students to explore them. Some examples of these such "modules" are "Stick and Knife Combatives", "Ground Survival", "Combat Throws", "Anatomical Target Striking/Pressure Points", "Trapping", "Cane", "Dan Bong", and "Weapons Disarming". New modules are supported by DVDs, seminars, and local instruction conducted by certified instructors of each course. ICHF students are required to know the core curriculum for promotion and are encouraged to study various optional modules as well. Instructors may require their students to learn some of these additional modules to advance levels. Rank Structure Combat Hapkido uses a ten belt rank system for both the non-black belt and Black Belt ranks with the difficulty and the number of techniques gradually increasing with each belt. The content of each rank can vary from school to school; however, the core curriculum of Combat Hapkido must be taught to each rank before the promotion can be sent to the ICHF Headquarters for certifying. All rank certification is done directly through the ICHF Headquarters in Florida and is kept on file to insure that each student meets the proper time in grade requirements. For higher Dan grade black belt tests, students must appear before Grandmaster John Pellegrini for testing either directly at the Headquarters or at one of the many seminars held around the country. For those seeking international Dan Ranking the International Combat Hapkido Federation offers the option to have black belt ranks recognized through the Kido Hae. Many Combat Hapkido Schools use the following system: Ground Survival Combat Hapkido's "Ground Survival" program previously referred to as the "Ground Grappling" program was developed to create a ground self-defense program where the purpose is to survive