Editing Bermuda Triangle (section)

====Compass variations====
[[Compass]] issues are frequently cited in accounts of Triangle incidents. While some have theorized that unusual local magnetic anomalies may exist in the area,<ref name="USNAVY">{{cite web |url=http://www.history.navy.mil/faqs/faq8-1.htm |title=Bermuda Triangle |publisher=US Navy|access-date=26 May 2009|archive-date=2 August 2002|archive-url=https://web.archive.org/web/20020802035846/http://www.history.navy.mil/faqs/faq8-1.htm|url-status=dead}}</ref> such anomalies have not been found. Compasses have natural [[magnetic variation]]s in relation to the [[Poles of astronomical bodies#Magnetic poles|magnetic poles]], a fact that navigators have known for centuries. [[magnetic north pole|Magnetic (compass) north]] and [[true north|geographic (true) north]] are exactly the same only for a small number of places – for example, {{as of|2000|lc=y}}, in the United States, only those places on a line running from [[Wisconsin]] to the [[Gulf of Mexico]].<ref>{{cite web |title=<nowiki>National Geomagnetism Program &#124; Charts &#124; North America &#124; Declination</nowiki> |publisher=[[United States Geological Survey]] |url=http://geomag.usgs.gov/charts/IGRF2000.dec.na.pdf|access-date=28 February 2010|url-status=dead|archive-url=https://web.archive.org/web/20100527143024/http://geomag.usgs.gov/charts/IGRF2000.dec.na.pdf|archive-date=27 May 2010}}</ref> But the public may not be as informed, and think there is something mysterious about a compass "changing" across an area as large as the Triangle, which it naturally will.<ref name="Kusche, 1975"/>