You are visitor number 208 since September 2000. Permission is granted for reproduction provided that the whole document remains intact. Generally about mounting All materials used for mounting and situated near the compass must be nonmagnetic or the function of the compass will be disturbed. You can check if something, e g a screw, is nonmagnetic by nearing it to the compass and also moving it sideways along the face of the cupola. If the reading of the compass doesn't change it is nonmagnetic.
Compasses disturb each other if they are placed too close.
The compass housing consists of two cupola which must be free to move with respect to each other, to compensate for temperature differences. Make sure you are not restricting this movement the way you mount the compass. The 100P, 103P, 103PE compasses are intended for bulkhead mounting. With additions, see notes in table on price specifications and how to select page, they can become a quite nice free standing compasses. The 1000 model can be bulkhead mounted but also comes with a rear cover and therefore also makes a nice free standing compass.