Is there an advantage to taking AN/DP and Helitrox together? On here, I commonly see divers mention the first two usually together but not in combination of the third.
Seems to be fairly common here on the Great Lakes from the divers I know. A little something to take the edge off the narc we can get from the colder and darker waters we dive. A buddy in the region is taking the same combo this year. I get narced bad at 130ft, so why not have the safety margin?