AfterDark
Contributor
You certainly won't need one if regulars conditions.
But imagine being tangled or on a night dive and needed one.
I have something in the area of 1500-1800 night dives and counting haven't needed a BU mask yet.
The best solution for entanglement is to avoid it, however if a diver is entangled and sans mask, that diver has really screwed the pooch somehow and needs buddy backup more than a mask at that point. If the diver does mange to get free then a reevaluation of their solo diving is in order. IMO