The record made by an echo-sounder.
| 单词 | θ206028 | 
| 释义 | society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > 			[noun]		 > depth-finder > tracing made by (2)		 echogram1936 The record made by an echo-sounder. fathogram1950 A tracing, made by an echo-sounder, representing the varying depth of water beneath a moving vessel. | 
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