What connects the order a submarine commander responds to an underwater attack to your to do list?How does the Navy submarine checklist help you deal with your inbox?The Perisher Submarine Command Course is the most demanding in the world. It teaches the elite of the British Navy to deal with astonishing pressure of every sort.It's what allows you to lead your team in half a billion pounds worth of military hardware, including a nuclear reactor, weapons, operating alone in a void less explored than space.And now former submarine commander and Perisher teacher Ryan Ramsey is here to tell us how we can apply it in our own lives.Not many of us are going to have to make the decision of whether to fire a missile, but every day, the choices we make, the way we deal with pressure, how we choose to lead and be part of a team impacts our lives massively.