It is possible that they had a pre-arrainged deal where a private boat brought in divers doing permitted research (with a valid research permit that the lifeguards already have a copy of).
We've done it in the past for the S.D Oceans Foundation back when I was president - the boat owner gets a writeoff for the use of the boat for the day. Seeing it mid week even more leads me to believe that is the case, as it wouldnt be allowed on a weekend even with a permit...
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