What is another word for depth sounder?
Pronunciation: [dˈɛpθ sˈa͡ʊndə] (IPA) 
Depth sounder is a term used to refer to a device that is used by mariners to measure the depth of water beneath their boats or ships. Although "depth sounder" is a commonly-used term within marine circles, there are numerous alternative words and phrases that can be used to describe this type of device. Some of the most common synonyms for depth sounder include sounder, echosounder, echo sounder, fathometer, sonar, and depth finder. These terms can be used interchangeably, and essentially refer to the same type of equipment - a device that uses soundwaves to determine the depth of water below a vessel's hull.
