• Collect Salvage Keys and Deep Dive Keys by completing activities throughout the system. • Salvage and Deep Dive Chests containing Seasonal gear can be found at the end of Salvage activities and Deep Dives. Salvage Keys and Deep Dive Keys improve the rewards from their respective chests. • Decrypt Deep Engrams, acquired by completing activities and redeeming keys, at the Sonar Station in the H.E.L.M. to claim specific Season of the Deep gear and weapons. • Completing Seasonal Challenges in the Seasonal Bonuses category grants Sonar Station Upgrades, which provide a variety of benefits.