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Map showing the final boundaries of the United States Atlantic Neutrality Zone that became effective 27 May 1941.

Caption   Map showing the final boundaries of the United States Atlantic Neutrality Zone that became effective 27 May 1941. ww2dbase
Source    ww2dbaseWikimedia via Wikiuser Uwe Dedering
More on...   
United States Neutrality Patrol   Main article  Photos  Maps  
Photos on Same Day 27 May 1941
Photos at Same Place Atlantic Ocean
Added By David Stubblebine
Added Date 1 Nov 2016

This photograph has been scaled down; full resolution photograph is available here (1,181 by 1,441 pixels).

Licensing  Creative Commons

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Visitor Submitted Comments

1. Commenter identity confirmed David Stubblebine says:
1 Nov 2016 11:59:09 AM

The line on this map represents the boundary as it was described on paper. In actual practice, it was impossible from the outset to properly patrol any zone as large as Roosevelt pictured, certainly one as large as what is shown here. Also, the documents establishing the zone’s boundaries included a specific carve-out for the Azores and the practice never encroached as close to continental Africa as the map suggests. The result was that the vertical boundary, in effect, was more of a meandering S-shape from Iceland down the middle of the ocean to 20-degrees south latitude. Had they known about the mid-Atlantic Ridge in 1941, the line would have more-or-less followed that.

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Modern Day Location
WW2-Era Place Name Atlantic Ocean
Lat/Long -20.0000, -20.0000
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Winston Churchill, on the RAF