单项选择题 （）offers a detailed description of tidal theory and its application to the analysis and prediction of tides and tidal streams.

单项选择题 （）is a comprehensive reference in graphical and textual form of all Admiralty Charts and Publications worldwide（link to Admiralty Charts）listed by region.

单项选择题 （）gives listings of all lighthouses，lightships，lit floating marks（over 8m in height），fog signals and lights of navigational significance.