Scuba Steve - youre brother needs to take things one step at a time. Being a police officer is a career that he really needs to concentrate on first. Its hard enough actually becoming a police officer, nevermind already thinking about what assignments he might have. His goal should first be to get as much education he can to be the best police officer he can be. Then think about assignments. Just because someone is a sport diver, does not mean they have what it takes to be a PSD, but it is a start.