diff --git a/src/NmeaParser/Nmea/Gns.cs b/src/NmeaParser/Nmea/Gns.cs
index ed4c1d6..78557d5 100644
--- a/src/NmeaParser/Nmea/Gns.cs
+++ b/src/NmeaParser/Nmea/Gns.cs
@@ -149,7 +149,7 @@ namespace NmeaParser.Messages
             ModeIndicators = message[5].Select(t => ParseModeIndicator(t)).ToArray();
             NumberOfSatellites = int.Parse(message[6], CultureInfo.InvariantCulture);
             Hdop = NmeaMessage.StringToDouble(message[7]);
-            OrhometricHeight = NmeaMessage.StringToDouble(message[8]);
+            OrthometricHeight = NmeaMessage.StringToDouble(message[8]);
             GeoidalSeparation = NmeaMessage.StringToDouble(message[9]);
             var timeInSeconds = StringToDouble(message[10]);
             if (!double.IsNaN(timeInSeconds))
@@ -236,7 +236,7 @@ namespace NmeaParser.Messages
         /// <summary>
         /// Orthometric height in meters (MSL reference)
         /// </summary>
-        public double OrhometricHeight { get; }
+        public double OrthometricHeight { get; }
 
         /// <summary>
         /// Geoidal separation in meters - the difference between the earth ellipsoid surface and mean-sea-level (geoid) surface defined by the reference datum used in the position solution<br/>
diff --git a/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs b/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs
index fd187e7..ec0bca3 100644
--- a/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs
+++ b/src/UnitTests/NmeaParser.Tests/NmeaMessages.cs
@@ -516,7 +516,7 @@ namespace NmeaParser.Tests
             Assert.AreEqual(1, gns.ModeIndicators.Length);
             Assert.AreEqual(19, gns.NumberOfSatellites);
             Assert.AreEqual(.6, gns.Hdop);
-            Assert.AreEqual(406.110, gns.OrhometricHeight);
+            Assert.AreEqual(406.110, gns.OrthometricHeight);
             Assert.AreEqual(-26.294, gns.GeoidalSeparation);
             Assert.AreEqual("0138", gns.DgpsStationId);
             Assert.AreEqual(Gns.NavigationalStatus.Safe, gns.Status);
@@ -542,7 +542,7 @@ namespace NmeaParser.Tests
             Assert.AreEqual(0, gns.ModeIndicators.Length);
             Assert.AreEqual(6, gns.NumberOfSatellites);
             Assert.AreEqual(double.NaN, gns.Hdop);
-            Assert.AreEqual(double.NaN, gns.OrhometricHeight);
+            Assert.AreEqual(double.NaN, gns.OrthometricHeight);
             Assert.AreEqual(double.NaN, gns.GeoidalSeparation);
             Assert.AreEqual(TimeSpan.FromSeconds(2), gns.TimeSinceLastDgpsUpdate);
             Assert.AreEqual("0", gns.DgpsStationId);
@@ -573,7 +573,7 @@ namespace NmeaParser.Tests
             Assert.AreEqual(Gns.Mode.NoFix, gns.ModeIndicators[4]);
             Assert.AreEqual(10, gns.NumberOfSatellites);
             Assert.AreEqual(1.4, gns.Hdop);
-            Assert.AreEqual(402.411, gns.OrhometricHeight);
+            Assert.AreEqual(402.411, gns.OrthometricHeight);
             Assert.AreEqual(-32.133, gns.GeoidalSeparation);
             Assert.AreEqual(TimeSpan.MaxValue, gns.TimeSinceLastDgpsUpdate);
             Assert.AreEqual(null, gns.DgpsStationId);
@@ -621,7 +621,7 @@ namespace NmeaParser.Tests
             Assert.AreEqual(0, gns.ModeIndicators.Length);
             Assert.AreEqual(4, gns.NumberOfSatellites);
             Assert.AreEqual(double.NaN, gns.Hdop);
-            Assert.AreEqual(double.NaN, gns.OrhometricHeight);
+            Assert.AreEqual(double.NaN, gns.OrthometricHeight);
             Assert.AreEqual(double.NaN, gns.GeoidalSeparation);
             Assert.AreEqual(TimeSpan.FromSeconds(2), gns.TimeSinceLastDgpsUpdate);
         }