Petty Officer 1st Class Alexander Alfonso, an information systems technician attached to Electronics Support Detachment Baltimore, discusses operations at ESD Baltimore at the Coast Guard Yard, Baltimore, Feb. 16, 2021. ESD Baltimore covers three major area commands that includes 26 sub-units through 2,800 square miles. (U.S.Coast Guard video production by Petty Officer 3rd Class Kimberly Reaves/Released)
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