The stability of a cable towed through the sea has suggested the use of its weighted end as a platform for velocity measurement. This report describes an instrument, lowered on standard hydrographic wire, which uses mechanical sensors to record speed, temperature, and pressure on a waxed paper roll. Initial measurements are presented which indicate that the vertical profile of an ocean current can be determined in approximately one hour.
Malkus, Willem V.. 1953. "A recording bathypitotmeter." Journal of Marine Research 12, (1). https://elischolar.library.yale.edu/journal_of_marine_research/782