Yogi's research interests are in the processes that involve turbulence at the sea surface and on the sea floor. These processes affect sediment suspension and transport on the sea floor, and they determine gas exchange and surface currents at the sea surface. Yogi's contributions to these fields include new measurement techniques with the use of laser instrumentation. In his first ocean research program, Yogi developed an autonomous deep-sea laser Doppler velocimeter which, operating at a depth of 5000 meters, obtained data on the structure of the boundary layer at small heights above the seabed. Subsequent applications of this technology has been made to study shallow water bottom boundary layers. The contributions in the surface boundary layer dynamics, made with a version of the deep-sea laser velocimeter, confirmed the existence of a super-dissipative layer beneath wind-forced, breaking waves. This work was
published in Nature (please see publications list). More recently, he is developing a laser sensor for the direct observation of the rate of turbulent kinetic energy dissipation, known as the dissipation rate.

A powerful series of instruments for measuring sediment properties are Yogi's other contribution to sediment transport research. Using laser diffraction techniques common in the laboratory, it is now possible to measure particle (including bubble) size distribution for periods up to several months in the sea from programmable, unattended, recording instruments. Sequoia Scientific, Inc. markets these instruments known as the LISST-100. Yogi co-founded Sequoia Scientific, Inc. with H. Charles (Chuck) Pottsmith, his partner in science and business. A newer version of this instrument incorporates a settling tube and is known as the LISST-ST. Sequoia has also developed a new concept sediment sensor, the LISST-25, which circumvents the historical problem of sediment concentration sensors - calibration change with changed particle size.

Yogi's other passions are his family and the propagation of the Sequoia Giganteum tree. His latest experiment is the propagation of the Sequoia in the Himalayas where he has planted 50 trees in 1998. Yogi thinks he plays tennis and soccer, although evidence of this activity is hard to find in modern times. The company Sequoia seems to be all consuming for now.