Similar to 53A

03I - Clarks Dream Strip Airport, Circleville, Ohio USA
03M - Lakeside Marina Seaplane Base, East Winthrop, Maine USA
03MD - Upper Chesapeake Medical Center Heliport, Bel Air, Maryland USA
03MI - Harold Miller Heliport, Bay City, Michigan USA
03MS - Vicksburg Medical Center Heliport, Vicksburg, Mississippi USA
03N - Utirik Airport, Utirik, Utirik Island, Marshall Islands
03S - Sandy River Airport, Sandy, Oregon USA

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