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:
“In love as in art, good technique helps.”
—Mason Cooley (b. 1927)
“The audience is the most revered member of the theater. Without an audience there is no theater. Every technique learned by the actor, every curtain, every flat on the stage, every careful analysis by the director, every coordinated scene, is for the enjoyment of the audience. They are our guests, our evaluators, and the last spoke in the wheel which can then begin to roll. They make the performance meaningful.”
—Viola Spolin (b. 1911)
“Irony in writing is a technique for increasing reader self- approval.”
—Jessamyn West (1907–1984)