| depth finder | (n) navigational instrument used to measure the depth of a body of water (as by ultrasound or radar) |
| sonic depth finder | (n) depth finder for determining depth of water or a submerged object by means of ultrasound waves, Syn. fathometer |
| 測深機 | [そくしんき, sokushinki] (n) depth finder [Add to Longdo] |