Very useful for finding the location of Sounding in Various Water Bodies i.e. Hydrographic Surveying.

1. HYDROGRAPHIC SURVEYING
THREE POINT PROBLEM
WHEN TWO ANGLES ARE MEASURED FROM THE
BOAT

2. THREE POINT PROBLEM
solved by THREE methods
MECHANICAL METHODS
GRAPHICAL METHODS
ANALYTICAL METHODS

3. MECHANICAL
METHODS
BY TRACING PAPER
BY STATION POINTER

4. 1. MECHANICAL METHOD
By Tracing Paper

5. By Station Pointer
1. MECHANICAL METHOD
By Station Pointer

6. GRAPHICAL METHODGRAPHICAL METHOD
First Method

7. GRAPHICAL METHOD
SECOND METHODSecond Method
GRAPHICAL METHOD

8. GRAPHICAL METHOD
THIRD METHODThird Method
GRAPHICAL METHOD

9. ANALYTICAL METHOD