http://buperscd.technology.navy.mil/bup_updt/508/unireg/chapter3/3500_seriesArticles/3501_30.htm
even has a picture of it. it just looks odd because seriously there is too much khaki.
There was a (nuke) LT at my old ROTC unit who religiously wore his khaki Eisenhower jacket. We all wondered when we first saw it, but it was legit