This picture of a Navionics chart is particularly interesting for any aspiring navigators out there. It demonstrates the difference in how land is displayed at different zoom levels on digital charts. For reference, the measuring pointers are in exactly the same place. Always zoom in and check your route!
Unless you're on your toes, you can see how incredibly easy it would be to sail straight into the southern part of the reef, thinking you've given it a wide berth. At night, you wouldn't even see it, and in the daytime, I doubt you'd notice much more than a bit of spray unless you were really looking. I've heard someone making a distress call and they gave their lat/long and said they had hit an uncharted reef. Of course this was pretty major news for me but sure enough looking at a paper chart the reef was clearly marked and if they had zoomed in to the digital one they would have seen it.
This image makes you realize how extremely difficult it must have been for early sailors. Before their voyages, the most senior cartographers would give them a blank parchment and ask them to fill it in along the way. As the old adage goes, "Information is power." When taking an enemy ship, one of the first things the victors would do was to get into the captain's cabin and seize all his charts and logbooks.
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