VERTCRS["MSL depth (ftUS)",
    VDATUM["Mean Sea Level"],
    CS[vertical,1],
        AXIS["depth (D)",down,
            LENGTHUNIT["US survey foot",0.304800609601219]],
    USAGE[
        SCOPE["Hydrography, drilling."],
        AREA["United States (USA) - onshore and offshore."],
        BBOX[15.56,167.65,74.71,-65.69]],
    ID["EPSG",8053]]