Ok so I just got this dive bag. It is great, easily fits both mine and my wife's equipment. I only have one question - I can't for the life of me figure out what the buckle on the front of the bag is for. There are three buckles on the bag. On the back it is clear the two buckles allow attatchment for the backpack straps. The buckle on the front is purely a mystery to me. I looked around and could not find an answer. Anyone know?