TrimixToo
Contributor
I'll just jump in to point out that no-BC diving is best done in warm-ish water and/or shallow depths. The reduction in volume for a thick wetsuit can easily overcome the amount of buoyancy differential one can manage with lung volume alone. At the start of a dive, especially, it could be hard to fin up from very deep. And, dumping weight to get up could result in an unsafe ascent speed.