|Hydra-Sandhawk, from the private collection of Fred Seward, who was the PI of the science experiments on the launches.|
This thread on NASAspaceflight.com features vintage photos of various sounding rockets, including the Bullpup-Cajun, Aerobee 75, Dualhawk (Sandhawk-Tomahawk), Hydra-Sandhawk, Nike-Nike-Deacon, Nike-Nike-T40-T55, Nike-Nike-Triple Deacon-T40, Sparoair II, and Sparoair III. I included a reduced resolution photo of the Hydro-Sandhawk, which launched 3/4 submerged from a floating platform. See the forum for the full sized version and a shot of it being loaded onto a ship. (via YORF)
You can find more on the Hydra-Sandhawk here.