Factsheets
Updating Paper Nautical Charts
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This factsheet provides a simple step-by-step process for mariners using the Australian Hydrographic Office (AHO) website to:
- Check that they hold the correct edition of a Paper Nautical Chart.
- Identify and apply any Notices to Mariners (NtM) required to keep the chart up to date.
The AHO issues NtM every fortnight. Updates to Paper Nautical Charts are derived from changes made to Electronic Navigation Charts (ENC) produced and maintained by the AHO.
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The AHO publishes and updates approximately 380 official paper nautical charts. The full portfolio of AHO published paper charts is commercially available through AHO Distribution Agents.