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post #9 of Old 10-04-2011
St Anna
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is may cause some argument, but;

If you are sure it is well charted. The course is fine. If unsure - give a wide berth.

I sailed in places where the paper chart says "first charted by Capt ? in HMAS Rattlesnake, 1878 and aerial recon 1944." I then take into consideration wg84 (gps) is a bit different and reefs grow. => give it a wide berth. eg the crocodile islands above arnhem land NT. AUST. They are at least 2nm off the real position. I saw a reef which was not on the chart and therefore not on the plotter at least 15nm away from the nearest plotted reef. Ships dont go there so it is not re-surveyed. Another eg is the Louisiades.

Sailing in the USA where the GPS satellites were invented for (!) should be OK.

You are sailing in a yacht and must minimize, but make your decision and accept the risks involved. That is the way it is.


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Last edited by St Anna; 10-04-2011 at 07:28 AM.
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