Very interesting article, Doc. Thanks for sharing. I'd never heard of them...but we didn't have the extent of open waterways up in I Corps that existed in the Mekong Delta.
Most of the PBRs on our rivers were SVN.
The article illustrates the improvisational nature of warfare in Vietnam, with certain specialty units--like this unit and the Combined Action Groups; thrown together kind of piecemeal at first in response to a tactical or strategic need...and gradually becoming fully established official units. And like CAG, stood down and disbanded before the last flight home.