diff --git a/lib/utils/coordinate_utils.test.ts b/lib/utils/coordinate_utils.test.ts
index 290fe4e..8f0a8b6 100644
--- a/lib/utils/coordinate_utils.test.ts
+++ b/lib/utils/coordinate_utils.test.ts
@@ -78,6 +78,15 @@ describe('CoordinateUtils', () => {
         }),
       ).toBe('12.345 S, 67.890 W');
     });
+
+    test('formats zero coordinates as N/E', () => {
+      expect(
+        CoordinateUtils.coordinateString({
+          latitude: 0,
+          longitude: 0,
+        }),
+      ).toBe('0.000 N, 0.000 E');
+    });
   });
 
   describe('getDirection', () => {
diff --git a/lib/utils/coordinate_utils.ts b/lib/utils/coordinate_utils.ts
index 1f92465..5afd343 100644
--- a/lib/utils/coordinate_utils.ts
+++ b/lib/utils/coordinate_utils.ts
@@ -76,8 +76,8 @@ export class CoordinateUtils {
     latitude: number;
     longitude: number;
   }): string {
-    const latDir = coords.latitude > 0 ? 'N' : 'S';
-    const lonDir = coords.longitude > 0 ? 'E' : 'W';
+    const latDir = coords.latitude >= 0 ? 'N' : 'S';
+    const lonDir = coords.longitude >= 0 ? 'E' : 'W';
     return `${Math.abs(coords.latitude).toFixed(3)} ${latDir}, ${Math.abs(coords.longitude).toFixed(3)} ${lonDir}`;
   }