Bessel Solution
It involve the below described steps:
1. Keep the bevelled edge of alidade along ba & sight object at A. Clamp the table and draw bc′ along the line bc .(ref fig b)
2. Keep bevelled edge of alidade along ab, unclamp the table & sight B. Clamp the table.
3. Draw line ac which is intersecting bc′ at d [ref.Fig. (b)].
4. Keep the alidade along dc and bisect C. Clamp the table [Fig. (c)]. This gives the accurate orientation.
5. Draw resectors to obtain 'p'.
![184_bessel solution.png](https://www.expertsmind.com/CMSImages/184_bessel%20solution.png)
(a) (b) (c) (d)
Graphical solution (Bessel's method)