The main technical charecteristisc of the hydrophysical profiler OLT a
re given. This device intend for complex measurements of currents and
hydrologic elements profiles: temperature, couduetivity, salinity, sou
nd velocity, density and gradient characteristics. The results of inte
rcalib-ration of OLT probe with independent devices of measurement are
consided. The example of profiler application in the Black Sea is rep
resented.