How does the FDC compute gun data from a grid coordinate target?

How does the FDC compute gun data from a grid coordinate target?

• A. Convert grid to relative position, determine azimuth and range, apply corrections, and issue firing orders.
• B. Convert grid to local weather conditions, then call in air support.
• C. Determine the target's grid zone and then estimate the range.
• D. Use the target's coordinates to directly set the gun elevation without azimuth.

Answer: (A)

The key idea is that the FDC turns the target’s grid coordinates into a complete firing solution. It starts by translating the target’s grid location into a relative position from the gun location. From there it determines the azimuth (the direction from the gun to the target) and the range (how far away the target is). But it doesn’t stop there—this initial line of fire is refined by applying corrections for ballistic and environmental factors (wind, temperature, air density, barometric pressure, etc.) and any observed target movement or other conditions. With the corrected data, the FDC then issues the firing orders that tell each gun the exact azimuth and elevation (or deflection and charge) to use, along with fuze settings if needed, so rounds land on target. This approach matches how grid coordinates become actionable fire data: convert to a relative bearing and distance, adjust for factors that affect flight, and deliver precise gun data to hit the target. The other options miss one or more of these steps—local weather alone doesn’t produce fire orders, estimating range from a grid zone without azimuth is incomplete, and setting elevation directly from coordinates ignores bearing and corrections.

The key idea is that the FDC turns the target’s grid coordinates into a complete firing solution. It starts by translating the target’s grid location into a relative position from the gun location. From there it determines the azimuth (the direction from the gun to the target) and the range (how far away the target is). But it doesn’t stop there—this initial line of fire is refined by applying corrections for ballistic and environmental factors (wind, temperature, air density, barometric pressure, etc.) and any observed target movement or other conditions. With the corrected data, the FDC then issues the firing orders that tell each gun the exact azimuth and elevation (or deflection and charge) to use, along with fuze settings if needed, so rounds land on target.

This approach matches how grid coordinates become actionable fire data: convert to a relative bearing and distance, adjust for factors that affect flight, and deliver precise gun data to hit the target. The other options miss one or more of these steps—local weather alone doesn’t produce fire orders, estimating range from a grid zone without azimuth is incomplete, and setting elevation directly from coordinates ignores bearing and corrections.