diff --git a/lib/plugins/Label_15.test.ts b/lib/plugins/Label_15.test.ts
index 269543f..88c5e18 100644
--- a/lib/plugins/Label_15.test.ts
+++ b/lib/plugins/Label_15.test.ts
@@ -19,32 +19,62 @@ describe('Label_15', () => {
         });
     });
 
-    test('decodes variant 1', () => {
+    test('decodes short variant missing ???', () => {
         const text = '(2N39413W 73354--- 66349-43(Z'
         const decodeResult = plugin.decode({ text: text });
         
         expect(decodeResult.decoded).toBe(true);
         expect(decodeResult.decoder.decodeLevel).toBe('partial');
-        expect(decodeResult.formatted.items.length).toBe(2);
+        expect(decodeResult.formatted.items.length).toBe(3);
         expect(decodeResult.formatted.items[0].label).toBe('Aircraft Position');
         expect(decodeResult.formatted.items[0].value).toBe('39.688 N, 73.590 W');
         expect(decodeResult.formatted.items[1].label).toBe('Altitude');
         expect(decodeResult.formatted.items[1].value).toBe('34900 feet');
-        expect(decodeResult.remaining.text).toBe('--- 66-43');
+        expect(decodeResult.formatted.items[2].label).toBe('Outside Air Temperature (C)');
+        expect(decodeResult.formatted.items[2].value).toBe('-43 degrees');
+        expect(decodeResult.remaining.text).toBe('--- 66');
     });
 
-    test('decodes variant 2', () => {
+    test('decodes short variant all fields', () => {
         const text = '(2N40492W 77179248 99380-53(Z'
         const decodeResult = plugin.decode({ text: text });
         
         expect(decodeResult.decoded).toBe(true);
         expect(decodeResult.decoder.decodeLevel).toBe('partial');
-        expect(decodeResult.formatted.items.length).toBe(2);
+        expect(decodeResult.formatted.items.length).toBe(3);
         expect(decodeResult.formatted.items[0].label).toBe('Aircraft Position');
         expect(decodeResult.formatted.items[0].value).toBe('40.820 N, 77.298 W');
         expect(decodeResult.formatted.items[1].label).toBe('Altitude');
         expect(decodeResult.formatted.items[1].value).toBe('38000 feet');
-        expect(decodeResult.remaining.text).toBe('248 99-53');
+        expect(decodeResult.formatted.items[2].label).toBe('Outside Air Temperature (C)');
+        expect(decodeResult.formatted.items[2].value).toBe('-53 degrees');
+        expect(decodeResult.remaining.text).toBe('248 99');
+    });
+    
+    test('decodes short variant missing alt', () => {
+        const text = '(2N39269W 77374--- 42---- 5(Z'
+        const decodeResult = plugin.decode({ text: text });
+        
+        expect(decodeResult.decoded).toBe(true);
+        expect(decodeResult.decoder.decodeLevel).toBe('partial');
+        expect(decodeResult.formatted.items.length).toBe(2);
+        expect(decodeResult.formatted.items[0].label).toBe('Aircraft Position');
+        expect(decodeResult.formatted.items[0].value).toBe('39.448 N, 77.623 W');
+        expect(decodeResult.formatted.items[1].label).toBe('Outside Air Temperature (C)');
+        expect(decodeResult.formatted.items[1].value).toBe('-5 degrees');
+        expect(decodeResult.remaining.text).toBe('--- 42');
+    });
+    
+    test('decodes long variant', () => {
+        const text = '(2N39018W 77284OFF11112418101313--------(Z'
+        const decodeResult = plugin.decode({ text: text });
+        
+        expect(decodeResult.decoded).toBe(true);
+        expect(decodeResult.decoder.decodeLevel).toBe('partial');
+        expect(decodeResult.formatted.items.length).toBe(1);
+        expect(decodeResult.formatted.items[0].label).toBe('Aircraft Position');
+        expect(decodeResult.formatted.items[0].value).toBe('39.030 N, 77.473 W');
+        expect(decodeResult.remaining.text).toBe('OFF11112418101313--------');
     });
 
     test('does not decode Label 15 <invalid>', () => {
diff --git a/lib/plugins/Label_15.ts b/lib/plugins/Label_15.ts
index f2591f3..9ed9b9d 100644
--- a/lib/plugins/Label_15.ts
+++ b/lib/plugins/Label_15.ts
@@ -14,20 +14,25 @@ export class Label_15 extends DecoderPlugin {
     };
   }
 
-  decode(message: Message, options: Options = {}) : DecodeResult {
+  decode(message: Message, options: Options = {}): DecodeResult {
     const decodeResult = this.defaultResult();
     decodeResult.decoder.name = this.name;
     decodeResult.formatted.description = 'Position Report';
     decodeResult.message = message;
 
-    const twoZeeRegex = /^\(2(?<between>.+)\(Z$/;
-    const results = message.text.match(twoZeeRegex);
-    if (results?.groups) {
-      // Style: (2N38111W 82211266 76400-64(Z
-      const between = results.groups.between
-      ResultFormatter.position(decodeResult, CoordinateUtils.decodeStringCoordinatesDecimalMinutes(between.substring(0,13)));
-      ResultFormatter.altitude(decodeResult, 100 * Number(between.substring(19, 22)));
-      ResultFormatter.unknown(decodeResult, between.substring(13,19) + between.substring(22));
+    if (message.text.startsWith('(2') && message.text.endsWith('(Z')) {
+      const between = message.text.substring(2, message.text.length - 2);
+      ResultFormatter.position(decodeResult, CoordinateUtils.decodeStringCoordinatesDecimalMinutes(between.substring(0, 13)));
+      if (between.length === 25) { // short variant
+        ResultFormatter.unknown(decodeResult, between.substring(13, 19));
+        const alt = between.substring(19, 22);
+        if (alt != '---') {
+          ResultFormatter.altitude(decodeResult, 100 * Number(alt));
+        }
+        ResultFormatter.temperature(decodeResult, between.substring(22).replace(" ", "0"));
+      } else { // long variant
+        ResultFormatter.unknown(decodeResult, between.substring(13));
+      }
     } else {
       if (options.debug) {
         console.log(`Decoder: Unknown 15 message: ${message.text}`);