Plane table accessories or equipments required to carry out survey
![](https://i0.wp.com/viderime.com/wp-content/uploads/2023/06/VideRime.png?resize=591%2C335&ssl=1)
The instruments required to carry out the plane table survey are as follows:
• Plane table: It consists of board, 750×600 mm and about 25 mm thick. It is mounted on a tripod.
![](https://i0.wp.com/viderime.com/wp-content/uploads/2020/10/IMG_20201010_213906418.jpg?resize=1024%2C607&ssl=1)
• Alidade: This is the instrument, about 45 cm long which is used on the plane table for taking sights. It is made up of metal or wood.
![](https://i0.wp.com/viderime.com/wp-content/uploads/2020/10/Alidade.jpg?ssl=1)
• Spirit level: It is a small metal tube containing a small bubble of spirit. It is used for levelling the plane table.
![](https://i0.wp.com/viderime.com/wp-content/uploads/2020/10/IMG_20201010_213944124.jpg?resize=1024%2C503&ssl=1)
• Compass: It is made up of rectangular box of non-magnetic metal. It is used to make the north direction on the map.
![](https://i0.wp.com/viderime.com/wp-content/uploads/2020/10/IMG_20201010_213953147.jpg?resize=1024%2C387&ssl=1)
• U Fork or Plumbing Fork with Plumb Bob: It is a metal strip bent in the shape of a U having equal arm lengths. The top arm is pointed and the bottom arm carries a hook for suspending a plumb bob. It is used for centering the table over a station.
![](https://i0.wp.com/viderime.com/wp-content/uploads/2020/10/U-fork-1.jpg?ssl=1)
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