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Very high.
Not sure you can express it as a probability question though.
The actual definition depends on various factors including frequency (wavelength), scanner geometry and performance, scanning speed and geometry, the image-processing, water depth, scattering and absorption, nature of the objects being scanned, etc., but sonar performance is increasing all the time as the manufacturers all seek to produce better instruments than their rivals!
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How is sonar used in everyday life?
Sonar is probably right around the corner from you in the nearest hospital or medical clinic. Even some doctor's offices have the units on hand, as well as some veterinary clinics. It finds its broadest application in medical imaging. Use the link to the related question of the uses of sonar to see where else it may be used.
What is sonar frequency?
The frequencies on which sonar is used vary widely. Human hearing is usually cited as ranging as from 20 cycles per second (Hertz) to 20,000 cycles per second. There are many sonars that use frequencies in the 20 to 20,000 Hertz range. In general, the sonars that are used for short range underwater applications operate on a slightly higher frequency than those that are designed to look over long distances. But there are a lot of sonars which use frequencies far outside the range of human hearing. Medical imaging is the most popular use of sonar. The range of frequencies used by these devices range from 2 million cycles per second to 18 million cycles per second. These frequencies are far above what humans can hear.
What can Differences in ocean-surface height can be measured by?
Sonar
How do you measure the depth of a undersea wreck?
With sonar
How distance is measured?
-- ruler -- tape measure -- surveyor's walking wheel -- meter stick -- surveyor's chain -- odometer -- laser rangefinder -- radar -- sonar
