diff --git a/Axuno.Tools/GeoSpatial/Latitude.cs b/Axuno.Tools/GeoSpatial/Latitude.cs
index 0c71719..9ce5d3d 100644
--- a/Axuno.Tools/GeoSpatial/Latitude.cs
+++ b/Axuno.Tools/GeoSpatial/Latitude.cs
@@ -1,4 +1,5 @@
-using System.Globalization;
+using System;
+using System.Globalization;
 
 namespace Axuno.Tools.GeoSpatial;
 
diff --git a/Axuno.Tools/GeoSpatial/Location.Parser.cs b/Axuno.Tools/GeoSpatial/Location.Parser.cs
index d32770f..c30db78 100644
--- a/Axuno.Tools/GeoSpatial/Location.Parser.cs
+++ b/Axuno.Tools/GeoSpatial/Location.Parser.cs
@@ -8,6 +8,9 @@ namespace Axuno.Tools.GeoSpatial;
 /// </summary>
 public partial class Location
 {
+    // Default timeout value for the regular expressions
+    private static int _regExTimeout = 1000;
+
     /// <summary>Parsing latitude and longitude information.</summary>
     /// <example>
     /// User input:
@@ -83,15 +86,15 @@ private static class Parser
         private const RegexOptions Options =
             RegexOptions.Compiled | RegexOptions.IgnorePatternWhitespace | RegexOptions.IgnoreCase;
 
-        private static readonly Regex DegreeRegex = new(DegreePattern, Options);
+        private static readonly Regex DegreeRegex = new(DegreePattern, Options, TimeSpan.FromMilliseconds(_regExTimeout));
 
-        private static readonly Regex DegreeMinuteRegex = new(DegreeMinutePattern, Options);
+        private static readonly Regex DegreeMinuteRegex = new(DegreeMinutePattern, Options, TimeSpan.FromMilliseconds(_regExTimeout));
 
-        private static readonly Regex DegreeMinuteSecondRegex = new(DegreeMinuteSecondPattern, Options);
+        private static readonly Regex DegreeMinuteSecondRegex = new(DegreeMinuteSecondPattern, Options, TimeSpan.FromMilliseconds(_regExTimeout));
 
         private static readonly Regex IsoRegex =
             new(IsoPattern,
-                RegexOptions.Compiled | RegexOptions.CultureInvariant | RegexOptions.IgnorePatternWhitespace);
+                RegexOptions.Compiled | RegexOptions.CultureInvariant | RegexOptions.IgnorePatternWhitespace, TimeSpan.FromMilliseconds(_regExTimeout));
 
         private static Location? CreateLocation(Angle? latitude, Angle? longitude, double? altitude)
         {
@@ -216,7 +219,7 @@ private static double MakeSameSign(double source, double value)
         }
 
         /// <summary>
-        ///     Parses the input string for a value containg a pair of degree
+        ///     Parses the input string for a value containing a pair of degree
         ///     minute second values.
         /// </summary>
         /// <param name="value">The input to parse.</param>
@@ -278,13 +281,13 @@ private static double MakeSameSign(double source, double value)
                     break;
                 case 3: // sign + MM : value is degrees and minutes
                     angle = Angle.FromDegrees(
-                        int.Parse(value.Substring(1, degreeDigits), CultureInfo.InvariantCulture),
+                        int.Parse(value.AsSpan(1, degreeDigits), CultureInfo.InvariantCulture),
                         double.Parse(value[(degreeDigits + 1)..], CultureInfo.InvariantCulture));
                     break;
                 case 5: // sign + MM + SS : value is degrees, minutes and seconds
                     angle = Angle.FromDegrees(
-                        int.Parse(value.Substring(1, degreeDigits), CultureInfo.InvariantCulture),
-                        int.Parse(value.Substring(degreeDigits + 1, 2), CultureInfo.InvariantCulture),
+                        int.Parse(value.AsSpan(1, degreeDigits), CultureInfo.InvariantCulture),
+                        int.Parse(value.AsSpan(degreeDigits + 1, 2), CultureInfo.InvariantCulture),
                         double.Parse(value[(degreeDigits + 3)..], CultureInfo.InvariantCulture));
                     break;
                 default:
@@ -301,7 +304,7 @@ private static bool TryGetValue(Match match, string groupName, out string? resul
             var group = match.Groups[groupName];
 
             // Need to check that only a single capture occurred, as the suffixes are used more than once
-            if (group.Success && group.Captures.Count == 1)
+            if (group is { Success: true, Captures.Count: 1 })
             {
                 result = group.Value;
                 return true;
diff --git a/Axuno.Tools/GeoSpatial/Location.cs b/Axuno.Tools/GeoSpatial/Location.cs
index 8549931..09db794 100644
--- a/Axuno.Tools/GeoSpatial/Location.cs
+++ b/Axuno.Tools/GeoSpatial/Location.cs
@@ -202,7 +202,7 @@ public Angle Azimuth(Location point)
 
     /// <summary>
     ///     Calculates the great circle distance, in meters, between this instance
-    ///     and the specified value.
+    ///     and the specified value, using the Haversine formula.
     /// </summary>
     /// <param name="point">The location of the other point.</param>
     /// <returns>The great circle distance, in meters.</returns>
diff --git a/Axuno.Tools/GeoSpatial/LocationCollection.cs b/Axuno.Tools/GeoSpatial/LocationCollection.cs
index a24312b..d44680e 100644
--- a/Axuno.Tools/GeoSpatial/LocationCollection.cs
+++ b/Axuno.Tools/GeoSpatial/LocationCollection.cs
@@ -1,4 +1,5 @@
-using System.Collections;
+using System;
+using System.Collections;
 using System.Globalization;
 using System.Text;
 using System.Xml;
diff --git a/Axuno.Tools/GeoSpatial/LocationStyles.cs b/Axuno.Tools/GeoSpatial/LocationStyles.cs
index a3d6eaf..e4e549b 100644
--- a/Axuno.Tools/GeoSpatial/LocationStyles.cs
+++ b/Axuno.Tools/GeoSpatial/LocationStyles.cs
@@ -36,4 +36,4 @@ public enum LocationStyles
     /// and Iso styles are used.
     /// </summary>
     Any = Degrees | DegreesMinutes | DegreesMinutesSeconds | Iso
-}
\ No newline at end of file
+}
diff --git a/Axuno.Tools/GeoSpatial/MaidenheadLocator.cs b/Axuno.Tools/GeoSpatial/MaidenheadLocator.cs
index c55eb44..85cf62f 100644
--- a/Axuno.Tools/GeoSpatial/MaidenheadLocator.cs
+++ b/Axuno.Tools/GeoSpatial/MaidenheadLocator.cs
@@ -29,6 +29,9 @@ namespace Axuno.Tools.GeoSpatial;
 /// </remarks>
 public class MaidenheadLocator
 {
+    // Default timeout for regular expressions
+    private static int _regExTimeout = 1000;
+
     /// <summary>
     ///     Checks whether a string is a valid Maidenhead locator
     /// </summary>
@@ -36,7 +39,7 @@ public class MaidenheadLocator
     /// <returns>Return true, if the string is a valid Maidenhead locator</returns>
     public static bool IsLocator(string locator)
     {
-        return Regex.IsMatch(locator, "^[A-R]{2}[0-9]{2}[A-X]{2}$");
+        return Regex.IsMatch(locator, "^[A-R]{2}[0-9]{2}[A-X]{2}$", RegexOptions.None, TimeSpan.FromMicroseconds(_regExTimeout));
     }
 
     /// <summary>
@@ -95,4 +98,4 @@ public static Location LocatorToLocation(string locator)
 
         return location;
     }
-}
\ No newline at end of file
+}