SIGHTING DEVICE KIT
A sighting device is required for vertical surveys to align with a known reference direction.
The Polymetra sighting device for the isGyro is stored in a Peli Case 1400. It consists of:
-Rifle scope mounted on a special bracket holding 3 spirit levels
-Clamp (can be attached to any spanner face of the running gear)
-Locking plate
For surveys in underground mines and tunnels, a sighting device with two laser beams is available.
