Question 870Navigation General

The correct answer is A) tidal currents. The reasoning is that, according to the International Maritime Organization (IMO) and International Hydrographic Organization (IHO) standards for Electronic Chart Display and Information Systems (ECDIS), the electronic chart must display the minimum required data, which includes aids to navigation, regulatory boundaries, and hydrography, but does not necessarily include tidal currents. Tidal currents are considered supplementary information that may be displayed, but are not part of the minimum required data for an ECDIS chart. The other options (B, C, and D) are all part of the minimum required data that must be displayed on an ECDIS chart, which is why they are incorrect.