Ultra-marathon documentary film maker here and scuba/freediver, this literally looks like my next watch! There are so many features that this would work with both my film-making as I run around filming athletes and events in the mountains and freediving too, incredible. Yes indoor freediving is done horizontally in pools for distance with various disciplines but there is also depth pools as deep as 40m deep across Europe that we can "indoor" dive in. Thanks for the in-depth review!