A step-by-step worksheet for calculating tidal times and heights at secondary ports from standard port tidal data, including procedures for both semi-diurnal and diurnal tides.
A Hydrographic Note is used to notify the AHO when new or suspected dangers to navigation are discovered, changes are observed in aids to navigation, port infrastructure, or corrections to publications are seen to be necessary.
To submit a naming proposal for undersea, maritime, navigational, hydrographic or oceanographic features outside coastal waters, complete the attached AHO Undersea Feature Name Proposal form.
