The correct answer is B) Tidal Current Tables. Tidal Current Tables provide detailed information about the direction and velocity of rotary tidal currents, which are the dominant type of tidal currents found in many coastal areas. These tables, published by the National Oceanic and Atmospheric Administration (NOAA), contain data on the speed and direction of tidal currents at specific locations and times, allowing mariners to plan their routes and navigation accordingly. The other options are incorrect because: A) Tide Tables only provide information about the timing and height of tides, not the currents; C) Mariner's Guides may contain general information about tidal currents, but not the detailed data found in Tidal Current Tables; and D) Nautical Almanacs focus on astronomical information, such as the positions of celestial bodies, rather than tidal current data.