Umm. That's pretty standard. It isn't like you're trying to break a world record. Looking back at my logs, and diving completely open circuit, even 300 foot dives are only 90 minute runtimes, and 250 footers are less than an hour. I would not consider a dive that requires almost an hour of deco a little dive.
Understood. I consider it a "little" dive because it was only to 130' and with only 1 deco gas. My dive profile on the Tarpon, off Hatteras, NC, is snipped from Subsurface and shown below. 102 minutes run time. 47 minutes bottom time.
Our primary target for that day's dive was a different wreck that lies at 150', but we had to divert because of the weather. We chose to dive air because Best Mix (EAN25 or TX25/20) for 150' is not much different and air is a lot less expensive than a custom blend of 25%. My buddy and I are both certified for Helitrox, so we could have used up to 20% Helium. But, we agreed that we were both comfortable diving to 150' without Helium in the conditions we were anticipating (i.e. warm water, great viz, little current and a purely sightseeing dive). All in all, Air instead of the expense of 25/20 was a choice we were both totally fine with.
I splashed and started to descend the anchor line. My buddy wasn't behind me, as expected, so I went back up to the hang line to wait for him. He had some problem just as he started to splash, so he was delayed getting in. We did the dive. We each carried a single AL80 of 80% (mine actually analyzed at 76%) for deco. We are both only certified for 1 deco gas, so while 2 gases would have shortened our hang, we chose to stick with our certification limits yet make the most of them. My Seabear computer always calls for a 3 minute safety stop, even on a deco dive, after the deco has cleared. Just for the extra safety margin, I normally accommodate it, if I can - as I did that day and you can see by how the green ceiling indicator is gone and I still had 3 or 4 minutes after that before I got out.
