Which type of level requires the least amount of time to set up?

The automatic level is designed for efficiency and ease of use, requiring minimal setup time compared to other types of levels. Once the instrument is placed on a stable tripod, it automatically levels itself through internal compensators, allowing the user to get to work almost immediately. This means that users can achieve accurate horizontal measurements quickly without the need for extensive adjustments or manual leveling.

In contrast, the bubble level depends on a user to manually adjust and align the level until the bubble is centered within a vial, which can take more time, especially on uneven surfaces. The surveying level, while offering high precision, also involves setting up the instrument and ensuring it is perfectly leveled, which can take additional time. The water level relies on the principle of communicating vessels and can also require a more involved setup process, especially if the setup involves running hoses or ensuring clear visibility over distances.

Therefore, the efficiency and self-leveling feature of the automatic level make it the fastest to set up among the options provided.