The Back Deck Roll came to us sea kayakers from the white water paddling community. It’s a great roll if you are pinned back by a wave and don’t want to spend much time setting up. It’s a very odd body movement to learn. It is hard to explain how to move your body through the roll. I hope the diagrams help you. I struggle to complete this movement in one fluid motion. I am sure more practice will solve this for me.
You can view the video and tutorial here.