Updated charts

[Herbseesmoore]

When I recently downloaded the NOAA Chart for Amelia Island it show the old bridge on the south tip, which is now a fishing bridge, but did not show the new bridge which is not really that new, my question, how long will it take for the "new" bridge to show up.

Herbster

[DOCHO]

After somebody hit it. Probably.

[Talbot]

Originally Posted by Herbseesmoore

When I recently downloaded the NOAA Chart for Amelia Island it show the old bridge on the south tip, which is now a fishing bridge, but did not show the new bridge which is not really that new, my question, how long will it take for the "new" bridge to show up.

Have you reported the error to the map people?

If they dont know, they cant change the chart.

[Amgine]

Two time tables:

When the various parts of the governments finally inform each other of what they have done, sometimes NOAA is included in this and they might fill out a form to update a chart. Actually, iirc this bureaucratic process was killed in the 1970s because it didn't work.

When a chart is scheduled for review, which is usually when a new survey of an area is conducted. If the region has relevant commercial traffic this may happen once every 20 years or so, or during any period of heightened military paranoia (although in the past the newer surveys have often been kept secret for a decade or two.)

The latest US chart I have for Blaine includes data from the 20s, 50s, 80s, and 90s. I know of a couple places where the latest data is from Captain Cook. Not many of the rocks have moved, but there's been a lot of human development changes along the shore lines.

[Talbot]

Originally Posted by Amgine

When the various parts of the governments finally inform each other of what they have done, sometimes NOAA is included in this and they might fill out a form to update a chart. Actually, iirc this bureaucratic process was killed in the 1970s because it didn't work.

Whilst your cynicism may have some origin in truth when you are talking about a revised version, it is not the whole story. Chart corrections occur all the time for minor things such as movement of buoys etc. In UK these are sent out very frequently, and even published in some of the yachting magazines.

A revised bridge is a bit beyond a pen and ink correction, but not beyond the ability of UK chart corrections where they will even issue a small square covering the area of revision to be stuck over the chart. These are published as supplements to the Notice to Mariners - http://www.ukho.gov.uk/amd/wnm/2009/...rt1424NM54.pdf is an example.

[sandy daugherty]

Somebody somewhere was told to do a $100 job for $50. Probably by someone higher up who had absolutely no concern for the consequences, and could not see beyond keeping someone even higher up off his back. So He came up with some "reinterpretation" of what's needed that could be justified if things went bump in the night. As a result, charts are updated for commercial shipping, and "little boat" concerns are left to mellow with age, unless and until they hit the mid-week evening news when Congress is in Session, because some movie star's daughter is hurt. Then they fire the poor schmuck, and the higher-ups pat themselves on the back (with performance bonuses) for being responsive to public issues.
Forms of government vary dramatically, but all politicians think the same.

[Randy]

One possibility is this: the way NOAA and the DMA produce revised charts is that for any given chart after an accumulated number of corrections or changes have occurred with lights, bridges - in this case or any other bits of data they will be incorporated into a new revision. Until then revisions aresent out in 'Local Notice to Mariners' as I recall and it is up to the navigator to update their existing charts.