Deciphering the 281 message

[Ric Gillespie]

This chart is from an article in a 1941 issue of QST (ham radio magazine) about how poor sending technique can result in confused messages.  The chart shows which letters can easily be mistaken for other letter combinations.

It may help us identify probable errors in how the poorly sent 281 Message - Message 125 in the Post Loss Radio Signals Catalog - was interpreted by U.S. Navy operators.