The Kiel conical sediment trap and a 3:1 right cylinder were simultaneously deployed in both free-drifting and moored modes on four separate occasions over the Peruvian shelf in order to compare downward flux measurements derived from each….
Staresinic, Nick, Klaus von Bröckel, Nenad Smodlaka, and C. H. Clifford. 1982. "A comparison of moored and free-drifting sediment traps of two different designs." Journal of Marine Research 40, (1). https://elischolar.library.yale.edu/journal_of_marine_research/1584