What method is most effective for determining an accurate firing solution during registration?

The method of observation and adjustment is the most effective for determining an accurate firing solution during registration because it relies on real-time feedback from observing the effects of fire on the target area. This process allows operators to make immediate adjustments based on actual observed impacts, ensuring that the fire is accurately calibrated to hit the intended targets. By directly assessing how the rounds land relative to the target, the team can refine their firing parameters in a dynamic manner, which is essential for achieving precision.

In contrast, pre-planned fire data, while useful as a starting point, lacks the adaptability and immediacy of adjustments that observation and adjustment offers. Automated systems can assist with calculations but still require validation through observation, and random rounds lack the systematic approach needed for effective registration, yielding inconsistent results that do not provide a reliable foundation for future engagements. Therefore, observation and adjustment stands out as the best method for achieving accuracy in real-time scenarios.