Which navigation method would likely be the most effective in clear weather conditions?

Pilotage is the navigation method that relies on visual references and landmarks to determine position and course. In clear weather conditions, visibility is at its best, allowing pilots to easily identify features on the ground, such as roads, rivers, and mountains. This visibility makes it easier to steer a course based directly on recognizable terrain features, which is the essence of pilotage.

With pilotage, pilots can make real-time adjustments to their flight path based on what they observe, enhancing situational awareness and reducing the likelihood of navigation errors. This method is particularly effective because it combines visual navigation with practical experience of the terrain, making it a preferred choice when the weather allows for clear line-of-sight navigation.

In contrast, other navigation methods like radio navigation depend on the availability and functionality of signals, dead reckoning relies heavily on calculations that can accumulate errors over time, and visual estimation often involves approximations that may not be as precise. Pilotage capitalizes on the clarity offered by good weather, making it the most effective navigation method under those conditions.