However this poker hand turns out, one thing remains, Any "brown water" ship in the US Navy or all sailors that worked on shore bases in Vietnam are considered to be contaminated or exposed to AO. The Australian Navy includes the "Blue Water" ships also. THIS is the point of contention. The Australian navy considers the fact that "the rivers run to the sea" and therefore, that body of water also counts for exposure claims. Our Navy does not. Cooley is right that the use occurred in the earlier days of the "Conflict", But he is also correct that no one has shown a picture of it on board the hawk, so far. I fold, too rich for this kid. Besides, I got nuthin.