Answer:
Explanation:
Is to study the depth of water in the water bodies to see the height of the water column from the bottom to the surface.
Marine deep-sea navigation schemes are used to support ship safety and non-incidental navigation.
The depths appear on the map in the form of proportion lines called deep lines or lines of equal depth.
The device used to determine the depth is called a depth meter (or a gauging device), and the traditional methods used in the past are used for the measurement process, but at the moment it is done in a digital technique developed by satellite using a digital elevation model.
