During August, 1975, an experiment was carried out in the eastern Gulf of Maine with the Batfish, a towed undulating body, on which were mounted an in situ fluorometer and a conductivity-temperature-depth probe. The Batfish cycled between depths of about 4 and 40 m with a cycle length of order 0.6 km....
Denman, Kenneth L., and Alex W. Herman. 1978. "Space-time structure of a continental shelf ecosystem measured by a towed porpoising vehicle." Journal of Marine Research 36, (4). https://elischolar.library.yale.edu/journal_of_marine_research/1451