Chart correction warnings

• Some notices were only in Microsoft Word (TM) format. I don't have a program that converts Microsoft Word to text. Instead I just treat the Word file as though it were text. Mostly this works, but sometimes it fails. More recent notices are in PDF, which is more reliable.
• The Coast Guard maintains these files by hand, and so they contain typographical errors. If the errors are severe enough, I can't parse the corrections.
• In particular, sometimes the chart number or the edition number is wrong in the file. Then the correction goes in the wrong place, where you won't find it.
• The format of the files is not quite rigid enough to allow complete confidence in separating out the corrections. It's possible that some of them have been misclassified.
• Various tabulations, such as lists of drilling rigs, that appear at the end of the chart corrections have not been included because they are not associated with a specific chart.
• Some of the Local Notice to Mariners issues are just plain missing from the Coast Guard web site or are in unreadable formats. Here is a list of missing issues.
• If the first thing in the corrections file is not a "new edition" entry, then there may have been corrections in earlier issues that were not online.

Back to index of chart corrections