Module 7 - Charts & Publications
Maintain Paper and Electronic Information
ADMIRALTY Notices to Mariners are weekly updates containing corrections, alterations and amendments for ADMIRALTY charts and publications. The searchable service can be checked by chart number. A paper chart's edition date does not include changes published afterward, so its correction history and applicable temporary or preliminary information still matter.
A new edition cancels the edition it replaces. Obtain the new chart, verify its publication and update status, and begin the subsequent correction record from that baseline. Do not copy an old correction history blindly: changes already compiled into the new edition and corrections that have lapsed must not be duplicated.
Electronic navigation also needs an auditable update path. Official ENCs or RNCs require suitable coverage, valid licences where applicable, installed updates and appropriate backup. A chart image displayed by a leisure plotter is not automatically official, current or complete; inspect the provider, data date, update result, scale warning and system status. Current local notices and radio navigational warnings can contain urgent information not yet compiled into the chart.
| Source | Status evidence | Action when uncertain |
|---|---|---|
| Paper chart | Edition plus applicable NM correction record | Search by chart number; update or replace |
| Official ENC/RNC | Coverage, licence and installed update report | Renew or install; verify backup |
| Leisure plotter chart | Provider, data date, update result and limitations | Do not infer official/current status from display operation |
| Publication | Edition plus applicable amendments or digital update status | Update or replace before use |
| Warning/local notice | Current route- and time-relevant message | Amend the plan and brief the crew |
Optional quick check
Section 3 of 5
A chart is the latest edition but its correction record is three months old. What is the safe next step?
Sources and factual review
Continue studying Charts & Publications
This public lesson is part of Revision Module 7. Full revision access adds the guided Learn, Practise and Test flow, flashcards and revision progress.