Each dive has elements that make it more or less difficult than another dive. This includes the body position (or combinations of positions) and from what approach (group) the dive will be taken. Each dive has its own ‘tariff’ or degree of difficulty – there is no distinction between running and standing take-offs. Dives must be executed either head-first or feet-first into the water. In all cases the body must be straight with the feet together and the toes pointed. In head-first entries the arms need to be extended beyond the head, and in feet-first dives the arms must be at the sides. The entry into the water must be vertical or nearly so.