U.S. Coast Guard Ensign Raileyann Westervelt (left) learns gas-free engineer protocols from Chief Petty Officer Bradley Robinson aboard Coast Guard Cutter Healy (WAGB 20) while transiting the Bering Strait, July 17, 2025. Gas-free engineers ensure that the confined spaces onboard ships are safe for entry and work, assessing for various threats such as toxic gases, low oxygen levels and flammability. (U.S. Coast Guard Photo by Petty Officer 3rd Class Chris Sappey)