The correct answer is A) Tidal Current Tables. Tidal Current Tables provide detailed information about the direction and velocity of rotary tidal currents, which are the circular movements of water caused by the gravitational pull of the moon and sun. These tables are published by the National Oceanic and Atmospheric Administration (NOAA) and are an essential reference for mariners navigating coastal and harbor areas. The other options are incorrect because: Tide Tables only provide information about the rise and fall of tides, not the movement of tidal currents (B); the Mariner's Guide is a general reference book that does not specifically contain tidal current data (C); and the Nautical Almanac is primarily used for celestial navigation and does not include detailed tidal current information (D).