Arrived at Horizon Divers in the morning at 8am to check-in for Northern Light dive and grab my rental tanks. I was pleasantly surprised to see my friend Doug at dive shop; He was completing his open circuit trimix class with Dan at Horizon Divers. Since I was unfamiliar with this wreck I would be tagging along with his group while they did their class. As such it was a shorter runtime. We planned a 25 minute or so bottom time with a total runtime of around 65 minutes due some gas constraints…