Petty Officer 2nd Class Steve Vanzant, center, assigned to company 2-6 of Mobile Diving and Salvage Unit 2, explains the components of a KM 37 dive helmet to Mexican navy divers aboard the Military Sealift Command rescue and salvage ship USNS Grasp. MDSU-2 is participating in navy diver exercises as part of Southern Partnership Station, a multinational partnership engagement designed to increase interoperability and partner nation capacity through diving operations.