As you know, these boats were on private property at the time so I felt as though we were trespassing, which of course we were !  My friend and video maker is Steve Meade who lives in NC. was in the boating industry at the time, as was I up in Connecticut. We used his john boat to cross the canal on our covert mission to inspect the boats. when the canal gate sirens went off,  I didn't know what to expect until I realized it was just the warning alarm ! 

I still have those ventilators I found in the sand and they are almost lamps (big lamps) ! This trip was a quest of fate for me in terms of loading them onto my ship for delivery to the Nam in 66', and then seeing them in their demise in 2007 , Sad! - Dennis