EPSG:5741 — Fair Isle height

VERTCRS[
    "Fair Isle height",
    VDATUM["Fair Isle",ID["EPSG",5139]],
    CS[vertical,1,ID["EPSG",6499]],
    AXIS["Gravity-related height (H)",up],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    GEOIDMODEL["ETRS89 to Fair Isle height (1)",ID["EPSG",10024]],
    ID["EPSG",5741]
]

+vunits=m +no_defs +type=crs

proj4.defs("EPSG:5741", "+vunits=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 5741,
  "name": "Fair Isle height",
  "kind": "vertical",
  "area": "UK - Fair Isle onshore",
  "unit": "metre",
  "bbox": [
    59.45,
    -1.76,
    59.6,
    -1.5
  ],
  "proj4": "+vunits=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (5741, 'EPSG', 5741, '+vunits=m +no_defs +type=crs', 'VERT_CS["Fair Isle height",VERT_DATUM["Fair Isle",2005,AUTHORITY["EPSG","5139"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5741"]]');

PROJECTION
  "+vunits=m"
  "+no_defs"
  "+type=crs"
END

5741=VERT_CS["Fair Isle height",VERT_DATUM["Fair Isle",2005,AUTHORITY["EPSG","5139"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","5741"]]