fathometer — English Dictionary

Noun

1. A depth finder that uses sound waves to determine the depth of water.

   Examples

   More examples (1)

   A Fathometer is just a vertical echo-ranger; its pings would sound the same and could drive a submarine out of position just as effectively as horizontal echo-ranging and might even make a contact.

Noun

1. depth finder for determining depth of water or a submerged object by means of ultrasound waves

   Synonyms

   sonic depth finder

   Broader terms

   depth finder