Technique
Distance is measured by multiplying half the time from the signal's outgoing pulse to its return by the speed of sound in the water, which is approximately 1.5 kilometres per second. For precise applications of echosounding, such as Hydrography, the speed of sound must also be measured typically by deploying a Sound Velocity Probe into the water. Echo sounding is effectively a special purpose application of sonar used to locate the bottom. Since a traditional pre-SI unit of water depth was the fathom, an instrument used for determining water depth is sometimes called a fathometer.
Read more about this topic: Echo Sounding
Famous quotes containing the word technique:
“Technique is the test of sincerity. If a thing isn’t worth getting the technique to say, it is of inferior value.”
—Ezra Pound (1885–1972)
“A successful social technique consists perhaps in finding unobjectionable means for individual self-assertion.”
—Eric Hoffer (1902–1983)
“Every notable advance in technique or organization has to be paid for, and in most cases the debit is more or less equivalent to the credit. Except of course when it’s more than equivalent, as it has been with universal education, for example, or wireless, or these damned aeroplanes. In which case, of course, your progress is a step backwards and downwards.”
—Aldous Huxley (1894–1963)