Just remember that any paper charts you have are wrong and the lats and longs are off by up to a mile. Most GPS charts are still out as well.

Hate to say it being a Brit and all but I've been told that it was screwed up in 1928 by the British Admiralty and has been copied incorrectly since.

I should clarify my statement - if you take the GPS coordinates and plot them on a chart you will not have an accurate reflection of your position. As an example if you take a GPS reading from in front of BYC and transfer that to a paper chart you will show yourself as being on the backside of the island.