The Ocean Pro Whistle is something that every scuba diver or snorkeller should have attached to them when in the water. It is a hard bright orange plastic whistle that can be heard from quite a distance. The split ring attachment allows it to be securely kept with you without loosing it. A safety item that could potentially save your life in an emergency situation. Imagine if you got lost from the group that you were with, be it diving or snorkelling, this whistle can be blown and heard by anyone around and there fore you can get home safe. It is extremely affordable and super small that it can even be placed in to your pocket for an emergency.