Deep Sea Locksmith

Deep Sea Locksmith is a seasonal bonus on the Sonar Station upgrade list from Season of the Deep. It unlocks by defeating each unique boss in Deep Dive activities, which are J4W-S, Wrathborn Servitor; Kudazad, Bound to Xivu Arath; and Kelgorath, Taken from Bones. Once unlocked, redeeming a Salvage Key has a chance to earn a Deep Dive Key. The upgrade belongs to a season that has ended, so it is not expected to be obtainable in the current game.