East River Mystery 4

Here are previous posts in this series.

And this set comes from Mike Abegg, whose photos have been used here previously.   Check this out.  All I know about the yellow vessel is that it looks like a Griffon 1000TD.

Anyone know the whences and whose . . . inquiring minds wish to know.

Thanks to Mike for sharing these photos.

Somewhat related . . . does anyone you know refer to the East River or any portion of it as the Sound River?