From the south to the north (90 m) in Montola mine

Diving 90 m level yellow line from the south to the north (03.07.2020). Montola mine: https://www.montolankaivossukeltajat.... Dive: dive time 3 h 12 min max depth 91 m water temperature 4 C Gear: JJ Rebreather (http://jj-ccr.com/) NLS scooter and lights (http://www.northernlightscuba.fi/) GoPro Hero 5 Black with IQSUB 150m Delrin Underwater housing Ursuit drysuit (https://www.ursuit.com/) Mares and Apeks regulators Gases: diluent trimix 10/70 bailouts: oxygen, nitrox 50, trimix 20/41, trimix 15/48, timix 11/68