Yes, you have it right. Dry incubation is mainly called this, because in most areas people don't have to add water to the incubator to get the desired 20-30% humidity. In some cases, people have to add water though. I Dry incubate. I don't call it "Dry Hatch" anymore, because that really doesn't make sense.
By the way, you want about 70% humidity for Lock Down. Good luck.
By the way, you want about 70% humidity for Lock Down. Good luck.