> explain.  Sought help from local and state military
 > offices to no avail?
 > Please contact if you know answer?  address through
I suspect it is something in military history - perhaps a search into a 
historical book would give the answer. I, too, checked several Naval guides 
and manuals that we have here. (My husband is active duty Navy.) The only 
thing I came up with was that it took as long as 20 minutes to load and fire 
a gun, way back when; gun salutes always come in odd numbers and at 5 second 
intervals, and 21 guns is only during certain occasions.
                                 -donna
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