Where to get chart corrections in Australia?

Download the Notices to Mariners (NtMs) from the AHO website or use the free eNotices email service for specific charts or Boat Books Australia offers a service to correct Charts worldwide.

How do I keep ENCs updated?

Download weekly update files from your ENC provider or the AHO.

How do I verify electronic charts are official/current?

Check for the "Official ENC" status in the system and the last update date.

How do I check for the latest corrections?

Compare chart edition/Notices to Mariners (NtM) number with AHO website.

Where do I find Notices to Mariners?

Fortnightly updates are posted on the AHO (hydro.gov.au) website.

How often are Australian charts updated?

Paper charts are updated via fortnightly NtMs; ENCs are updated weekly.

What if a buoy or light is missing?

Report it immediately to AMSA or the state maritime authority.

How do I report a chart discrepancy?

Submit a Hydrographic Note (Form AH 102) to the AHO.

Do state agencies publish their own updates?

Yes, agencies like MSQ or TfNSW provide local "Notice to Mariners."

Interpreting charted vs reported features?

"Reported" features (Rep) have not been verified by a formal hydro survey.

Safest workflow for a long passage?

Update all ENCs/Paper charts via the latest NtMs the week of departure.