mélységmér
Mélysegmer is a Hungarian term that translates to "depth sounding" or "depth measurement." It refers to the process of determining the depth of a body of water. This can be accomplished through various methods, ranging from simple manual techniques to sophisticated electronic instruments. Historically, sounding lines, essentially weighted ropes or wires marked with depth intervals, were used. A sounding line would be lowered to the bottom, and the length of line deployed indicated the depth.
In modern hydrography, echo sounders, also known as sonar, are the primary tools for depth measurement. These