A cap with detailed course embroidery will be a great addition to your wardrobe. A heading indicator is a pilot's instrument used on airplanes to inform the pilot of the aircraft's course. Sometimes it is called a gyro-polocompass.
The atmosphere of the cockpit, the status of the commander, and recognizable pilot details in one accessory. At first glance, this cap is clearly intended for those who live and breathe aviation, not just wear hats.