diff --git a/simgear/misc/strutils.cxx b/simgear/misc/strutils.cxx
index 1de78be5..b15a73e7 100644
--- a/simgear/misc/strutils.cxx
+++ b/simgear/misc/strutils.cxx
@@ -1379,6 +1379,35 @@ std::string formatLatLonValueAsString(double deg, LatLonFormat format,
     case LatLonFormat::DECIMAL_DEGREES_SYMBOL:
         ::snprintf(buf, sizeof(buf), "%3.6f%s%c", deg, degSym, c);
         break;
+            
+    case LatLonFormat::ICAO_ROUTE_DEGREES:
+    {
+        min = (deg - int(deg)) * 60.0;
+        if (min >= 59.9995) {
+            min -= 60.0;
+            deg += 1.0;
+        }
+        
+        if (static_cast<int>(min) == 0) {
+            // 7-digit mode
+            if (c == 'N' || c == 'S') {
+                snprintf(buf, sizeof(buf), "%02d%c", int(deg), c);
+            } else {
+                snprintf(buf, sizeof(buf), "%03d%c", int(deg), c);
+            }
+        } else {
+            // 11-digit mode
+            if (c == 'N' || c == 'S') {
+                snprintf(buf, sizeof(buf), "%02d%02d%c", int(deg), int(min), c);
+            } else {
+                snprintf(buf, sizeof(buf), "%03d%02d%c", int(deg), int(min), c);
+            }
+        }
+        break;
+    }
+            
+    default:
+        break;
     }
  
     return std::string(buf);
@@ -1390,6 +1419,12 @@ std::string formatGeodAsString(const SGGeod& geod, LatLonFormat format,
     const char ns = (geod.getLatitudeDeg() > 0.0) ? 'N' : 'S';
     const char ew = (geod.getLongitudeDeg() > 0.0) ? 'E' : 'W';
     
+    // no comma seperator
+    if (format == LatLonFormat::ICAO_ROUTE_DEGREES) {
+        return formatLatLonValueAsString(geod.getLatitudeDeg(), format, ns, degreeSymbol) +
+            formatLatLonValueAsString(geod.getLongitudeDeg(), format, ew, degreeSymbol);
+    }
+    
     return formatLatLonValueAsString(geod.getLatitudeDeg(), format, ns, degreeSymbol) + ","
         + formatLatLonValueAsString(geod.getLongitudeDeg(), format, ew, degreeSymbol);
 }
diff --git a/simgear/misc/strutils.hxx b/simgear/misc/strutils.hxx
index f4b14558..74fb7f39 100644
--- a/simgear/misc/strutils.hxx
+++ b/simgear/misc/strutils.hxx
@@ -396,7 +396,8 @@ namespace simgear {
           ZERO_PAD_DEGREES_MINUTES,
           ZERO_PAD_DEGREES_MINUTES_SECONDS,
           TRINITY_HOUSE,            ///< dd* mm'.mmm X, ddd* mm'.mmm X (Trinity House Navigation standard).
-          DECIMAL_DEGREES_SYMBOL        ///< 88.4*N,4.54*W
+          DECIMAL_DEGREES_SYMBOL,        ///< 88.4*N,4.54*W
+          ICAO_ROUTE_DEGREES,              ///< 52N045W or 5212N04512W - precision auto-selected
       };
       
       enum class DegreeSymbol
diff --git a/simgear/misc/strutils_test.cxx b/simgear/misc/strutils_test.cxx
index 07ff8c1c..35ac5b79 100644
--- a/simgear/misc/strutils_test.cxx
+++ b/simgear/misc/strutils_test.cxx
@@ -684,6 +684,14 @@ void test_formatGeod()
     SG_CHECK_EQUAL(strutils::formatGeodAsString(a, strutils::LatLonFormat::SIGNED_DECIMAL_DEGREES), "55.450000,-3.460000");
     SG_CHECK_EQUAL(strutils::formatGeodAsString(a, strutils::LatLonFormat::DEGREES_MINUTES_SECONDS),
                    "55*27'00.0\"N,3*27'36.0\"W");
+
+    
+    SG_CHECK_EQUAL(strutils::formatGeodAsString(a, strutils::LatLonFormat::ICAO_ROUTE_DEGREES),
+                   "5527N00327W");
+    SGGeod shortA = SGGeod::fromDeg(106, -34);
+    SG_CHECK_EQUAL(strutils::formatGeodAsString(shortA, strutils::LatLonFormat::ICAO_ROUTE_DEGREES),
+                   "34S106E");
+    
     
     const auto s = strutils::formatGeodAsString(a,
                                                 strutils::LatLonFormat::ZERO_PAD_DEGREES_MINUTES,
@@ -696,6 +704,8 @@ void test_formatGeod()
                                                 strutils::LatLonFormat::DECIMAL_DEGREES_SYMBOL,
                                                 strutils::DegreeSymbol::UTF8_DEGREE);
     SG_CHECK_EQUAL(s2, "6.156800\xC2\xB0S,106.827800\xC2\xB0" "E");
+    
+    
 }
 
 int main(int argc, char* argv[])