The dive tender shall perform a pre-check of the DPX before preparing it for diving and connecting to the IS-MIX.

Check that the diving hose is correctly wound from the last dive and free from damages.

Visually inspect all the connections and o-ring on the hoses and DPX surface unit. If they show signs of dirt, damage or they are missing, clean/replace with new ones.

Perform pre-dive check of DPX surface unit according to the procedures below for the planned dive: Deco gas diving (RED), Deep gas diving (DEEP).