HIF: Towing tank
Detailed Description
Photo of the towing tank in the Hydraulic Laboratory at the USGS Hydrologic Instrumentation Facility. Sized at 12 x 12 x 450 feet, this tank is used to test and calibrate instruments that measure water velocity by the principle of cup rotation, drag, Doppler effect, acoustic signal, electromagnetic field, deflection, and more. The tow vehicle is capable of speeds from 0 to 18 feet per second and has a platform size of 12 x 14 feet. The carriage is equipped with a data acquisition system designed to accept distance traveled, elapsed time, and meter pulse count information.
Sources/Usage
Public Domain.