Sound (solid, reliable)

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2 comments on this post.
  1. Elizabeth Lightwood:

    The Times is out of joint, perhaps?

  2. Dan S.:

    Today, the depth of water can be measured with sound, using sonar. I had assumed that “sounding” referred to a low-tech version of this – making some kind of noise in the water and listening carefully to the echoes, in order to get an indication of where the bottom was. I guess not.

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