The Australian Hydrographic Office (AHO) has ceased printing Australian National Tides Tables (AHP11) and Mariner's Handbook for Australian Waters (AHP20). Equivalent digital publications are available on the AHO website. The latest information, which is also available on demand, has improved situational awareness and navigational safety. Digital versions of AHP11 and AHP20 can be downloaded for free from The Product Downloads section of the AHO website.
Subscribers to eNotices at the AHO website can receive email notifications when new updates to these publications become available. Refer to Marine Order 27 or NSCV Part C, subsection C7C for more information on carriage requirements for nautical charts and publications.