Question 1939Navigation General

The correct answer is B) Tidal Current Tables. Tidal Current Tables provide detailed information about the duration and timing of slack water, which refers to the brief period when there is no significant horizontal movement of the water associated with the tidal current. This information is crucial for Coast Guard Captain's License Examinations, as knowing the timing of slack water is important for safe navigation. The other options, while useful nautical references, do not specifically focus on providing data about the duration of slack water. American Practical Navigator, Tide Tables, and Sailing Directions cover a broader range of maritime information, but do not have the specific details on slack water that can be found in the Tidal Current Tables.