For instance, the Sargasso Sea, which is the home of the Bermuda Triangle and the real reason why the area is so treacherous to sailing vessels. I'm no meteorologist but I think if you made Death Valley (which is below sea level) into an island (and perhaps surrounded it by mountains), that would condense the moisture out of the passing air and continually feed these winds. Next, make the topography of your island so that whenever the trade winds do kick up, all the air at the surface flows away from the island. Start off by having your island located in the doldrums anywhere between 5°N and 5°S. Only agile ships like schooners will be able to escape the trap.ĭoldrums, Trade Winds, Gyres, and optionally: Perpetual Overcast and Military Mandates. Large reefs like that reveal themselves through the continous braking of waves so the sailors will be alarmed in time, but the ship is trapped in lee shore position: Both wind and current are moving it against the reef which is a death trap. On the eastern side build reefs/shallows which are formed like a elongated horseshoe. So if the island is a far away from ports in the west (logistics), it is nearly impossible to reach from the western side. Fully-rigged sailships like in the 17th century can run close-hauled (zig-zagging in direction of the wind), but not very good. There both trade winds and the South Equatorial current are running in the same direction. Put the island in the subtropic southern pacific. MAKING IT MORE DANGEROUS AND IMPENETRABLE: James Cook had access to the newlyĪvailable lunar distance method and later copies of John Harrisons Reefs for further exploring and that was not possible Navigation allow the creation of maps which give location of Uncharted lands occurs during the 18th century. ![]() In fact, there is a reason why most of the exploring of Ground climbs very steep, it causes massive breakers, destroyingĪny ship stranded on the reef and making a passage per boat very They only leave very shallow water for passage. They are and were a very dangerous obstruction for ships if None of the inhabitants there (if there are any) would know of the world beyond the great storm, and no outside vessel would survive the trip through it. ![]() If the island were in the eye of such a hurricane, the winds there would be calm and the environment peaceful. It's not hard to imagine something like that existing on a habitable planet. Jupiter's Red Spot is an example of a hurricane that has been spinning for eons. ![]() If you're looking for a weather-related phenomenon, think of a permanent hurricane that encircles the island at all times. In fact, methane fissures are one of the more plausible explanations for the Bermuda Triangle (even though the Bermuda Triangle is myth ships are no more likely to sink there than anywhere else). Such fissures do exist naturally on the Earth. Methane gas has the very real-world property that it reduces the buoyancy of a water causing any boat passing over a gas fissure to capsize and sink. The only way to reach such an island would be by air (which your world doesn't have). An island that is entirely surrounded by an undersea methane gas fissure that is constantly active would be inaccessible by any kind of ship even with modern seafaring technology.
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