JOINT BASE PEARL HARBOR-HICKAM (April 30, 2024) A Sailor assigned to Mobile Diving and Salvage Unit (MDSU) 1 practices underwater welding techniques at Joint Base Pearl Harbor-Hickam, Hawaii, April 30, 2024. A component of Explosive Ordnance Disposal Group One, MDSU-1 provides combat ready, expeditionary, rapidly deployable mobile diving and salvage companies to conduct harbor and waterway clearance, salvage, underwater search and recovery, and underwater emergency repairs in any environment. (U.S. Navy photo)