How large is the zone-of-fire for each duck hunter seated back-to-back in a boat?

The zone-of-fire for each duck hunter seated back-to-back in a boat is 180 degrees because this configuration allows each hunter to cover a broad area without overlapping their shooting zones significantly. The 180-degree zone ensures that both hunters can effectively target birds coming from different directions while minimizing the risk of accidental shooting towards one another. This arrangement is designed for safety and efficient hunting, as it respects the need for each hunter to have enough space to aim and shoot while avoiding interference from the other. In contrast, narrower zones like 135, 90, or 45 degrees would not provide sufficient coverage or safety for hunters seated in such close proximity, leading to potential hazards or gaps in their coverage.