Name which plane table is preferred for higher precision in plotting

 Three distinct types of tables (boards and tripod ) having devices for levelling the plane table and controlling its orientation are in common use:

1. Traverse Table
2. Johnson Table
3. Coast Survey Table

In which Johnson Plane Table is more accurate than other types of plane table. Because its consist of Ball and socket which help to fix it easily and accurately.

So, Johnson Table is preferred where high precision is required.