In this breakout D1 is moving for the puck and D2 has an eye on the play. D2 will call “UP” to D1 letting him know that the best play is to turn up the strong side of the ice and pass the puck to the winger on the boards (LW). If the winger is tied up while D1 is moving with the puck the centermen is there for support and D1 can also make the pass to C.
The best time to use this breakout is when the other team has players near the net, or behind the net (or moving to that zone) and the best option is to move the puck right away up the strong side of the ice.
C is there for support (another option for D1) and RW will move across the ice to provide support once LW get’s the puck.