What is the use of Fathometer : A fathometer is used for ocean sounding where the depth of water is.

What is the use of Fathometer : A fathometer is used for ocean sounding where the depth of water is too much and to make a continuous and accurate record of depth of water below the boat or ship at which it is installed. 4. Define Hydrographic Survey: Hydrographic Survey is that branch of surveying which deals with the measurement of bodies of water. It is the art of delineating the submarine levels, contours and features of seas, gulfs, rivers and lakes.