Weekly Temporary & Preliminary Notices to Mariners → ECDIS user charts — runs entirely in your browser, nothing is uploaded
Drop the weekly T&P PDF (or TXT, or paste). Each notice is shown with its country: those already in the ADMIRALTY Information Overlay (AIO) are marked Included in AIO and left out; the others are ticked to be drawn as a user chart.
Drop the weekly Cancelled T&P list. Cancelled notices are taken out of the list below, and out of your last generated file if you load it here (so the updated file keeps the old notices that are still valid, drops the cancelled ones and adds the new ones).
Load the last user-chart file(s) you generated (Furuno .xml, JRC .csv or Kongsberg .nnt; if it was split into T&P 1, T&P 2 ... select them all). I show what is in it, what the cancelled list takes out and what the new notices add; then you generate the updated file. No previous file? Leave this empty and a new file is made.
Your files and notices stay in this browser. The working list is erased when you close the tab; nothing is kept on the device unless you press Save on this device.
The ECDIS holds only so many objects per user chart. When there are more, the result is split into T&P 1, T&P 2 ... If an import still fails, lower this number.
Circles smaller than this (for example a 30 m radius = 0.016 NM) are drawn at this radius, so they are never smaller than the real hazard.
Choose the ECDIS, then generate. If you loaded the last generated file(s), the new files are those updated (same ECDIS type).