Astro Compass Mk II:

• The Astro Compass Mk II was a compact and robust instrument designed specifically for aircraft use.
• It was primarily used for celestial navigation, allowing pilots to determine their precise position by measuring the angles between celestial bodies, such as the sun, moon, and stars, and the horizon.
• The Mk II was an improved version of its predecessor, featuring enhanced accuracy and reliability.
• It consisted of a spherical housing with a sighting mechanism and an internal compass, along with various knobs and dials for adjustments.
• Inside the housing, there were lenses and mirrors to assist with sighting celestial bodies.
• The device was calibrated to the geographic location and time, providing accurate readings even in challenging conditions.
• The Astro Compass Mk II played a crucial role in long-range navigation, especially during night flights or when other navigation aids were unavailable or unreliable.