Links - some familiar, some not

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Sea Devil SS 400

http://www.navsource.org/archives/08/08400.htm

USSVI

www.ussvi.org

Hull Number

http://www.hullnumber.com/

Unofficial Navy Site

https://www.navysite.de

Submarine Sailor

http://www.submarinesailor.com/

NavSource

http://www.navsource.org/archives/subidx.htm

Submarine Gear

http://www.submarinegear.com/