AKC Scent Work is a sport that is based on the task of working detection dogs to locate a scent and communicate to the handler that the scent has been found. Everything you need to know is in the AKC Scent Work Regulations Book linked below:
There are the four basic elements and levels for AKC titles. Once the dog has earn 3 qualified scores in the element at the same level of difficulty, the dog earns a title for that level of difficulty. New Level titles are earned when a dog titles in all elements within the same level of difficulty.
When a dog earns a element title and completes 10 qualified scores within the same element and difficulty level, they will be granted an Elite Element title. When a dog earns every Elite Element title in the same difficulty level, they will be granted the Elite Level title.
HD is a class where dogs must detect their handler's odor over the judge's odor. Dog must achieve three qualified runs at each level to earn an HD title. The levels are Novice, Advanced, Excellent and Masters.
The Detective Class offers an integrated search environment with an unknown number of hides in a variety of elements. The intent of the Detective Class is to emulate as closely as possible the work of a true detection dog. The Detective Class is open to dogs who have acquired at least one Master title in one of the four elements: SCM, SIM, SEM, or SBM