	The entire body of Rats during the Ratline is called a "Rat Mass." Since Rats are not officially fourth classmen until after Breakout, the Rat Mass is also not officially considered a graduating class until that time either. Prior to Breakout, the Rat mass is given a different style of year identifier to emphasize this difference. The year identifier starts with the year of the current graduating class (their dykes' class), followed by a "+3" to indicate the anticipated year of their own class. For example, cadets that make up the Class of 2022 were considered the "Rat Mass of 2019+3" as the members of their dykes' class graduated in 2019 and they themselves will graduate three years onward from then.