What information is most important when passing near a lighthouse?

Water depth, is the right answer.

Explanation:

In the modern world, there are many complicated navigation tools, but in the old times, the lighthouse remained the only navigation sailors had. Nevertheless, the lighthouse still is extremely crucial in the navigation. The lighthouse has an information chart which provides information about the area of the lighthouses and the depth of the water. Following this information, an experienced navigator can travel even without automated tools.

answer; passive listening;