Good find Linton, lovely pictures.
Perhaps a way to communicate with the home base has been included in the vertical fin ... we would stream a radio cable back 200 feet or so from the sail
on the first FBM's, but that was over three decades ago.
Hindsite sonar also comes to mind, but it is awfully noisy back there unless they go to all stop now days and listen without doing a crazy Ivan.
I wonder what that screw looks like, obviously built for speed.
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