This document outlines the Green-Amber-Red (GAR) risk calculation model for assessing risk. The GAR model evaluates six elements of risk - supervision, planning & team selection, team fitness, environment, event complexity, and assigns a risk value of 0-10 to each. It then calculates a total risk value to determine the overall risk level - green (low risk), amber (moderate risk) or red (high risk). The key aspect of risk assessment is discussion between the team to understand risks and how they will be managed.