What device is used to measure the angle of elevation for mortar firing?

• A. Ballistic calculator
• B. Aiming circle
• C. Elevation gauge
• D. Compass

Answer: (B)

The aiming circle is the device specifically designed for measuring the angle of elevation for mortar firing. It is utilized in conjunction with other tools to ensure accurate targeting and firing of mortars by allowing the user to establish the correct firing solution based on the desired trajectory. The aiming circle is typically equipped with levels and scales that facilitate precise angle measurements, which are essential for achieving the necessary range and hitting intended targets.

While other devices like ballistic calculators may assist in fire control calculations, they do not directly measure angles on the ground. Similarly, an elevation gauge is primarily used to read the angle on specific equipment but does not have the comprehensive application required for mortar firing adjustments. A compass, used to determine direction, does not provide the elevation measurements needed for this purpose. Therefore, the aiming circle stands out as the essential tool for this critical task in mortar operations.