Board Thread:Questions and Answers/@comment-38946269-20190327203506/@comment-38854225-20190330175300

@Peeper101. You are correct, and I was wrong (again). I hadn't tried this since I first started playing. I wasn't factoring in the players personal O2 = 45s. The starter air tank gives you 30s of O2 for a total of 75s. If you allow your O2 to get below 45s, say to 10s, then swapping the tank will only take you to 40s. Sorry about that.