Similar to M23

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
03SC - Seacoast Medical Center Heliport, Little River, South Carolina USA
03Y - former code for Hallock Municipal Airport, Hallock, Minnesota USA

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