Update game.js

game.js

@@ -1764,7 +1764,7 @@ class Game {
         const altitudeMeters = Math.round(this.fighter.altitude);
         const pitchDegrees = Math.round(this.fighter.rotation.x * (180 / Math.PI));
         const rollDegreesRounded = Math.round(rollDegrees);
-        const headingDegrees = Math.round(fighter.getHeadingDegrees());
+        const headingDegrees = Math.round(this.fighter.getHeadingDegrees());
         
         // 선회율 계산 (도/초)
         if (!this.lastHeading) this.lastHeading = headingDegrees;