Date of Original Version
POGO is a simple technique for measuring water transport between the surface and some preselected depth. Equipped with a 12-kHz pinger for tracking and range measurement, a xenon flasher for nighttime relocation, and a VHF beacon for daytime recovery, it has been used over 200 times in the Gulf Stream to measure volume transport and to provide a reference velocity (transport) for geostrophic calculations from pairs of hydrographic stations. This note gives a brief technical description of POGO and how it is used. Loran C was used for navigation in this study, but with the advent of the Global Positioning System (GPS), POGO can be used worldwide.
Rossby, T., Fontaine, J., & Hummon, J. (1991). Measuring Mean Velocities with POGO. J. Atmos. Oceanic Technol., 8(5), 713-717. doi: 10.1175/1520-0426(1991)0082.0.CO;2
Available at: http://dx.doi.org/10.1175/1520-0426(1991)0082.0.CO;2