The illustrative armboard assembly includes a lockable first joint coupling an armboard to a support arm, a lockable second joint coupling the support arm to a mounting post and a lockable third joint coupling the mounting post to a mounting rail. The system includes a footswitch device and a dentalmedical base unit, each having a communication element for transmitting and receiving signals. The slip remediation module, when the mathematical derivative is more negative than a predetermined deceleration, at least one of disables regenerative braking being performed by one or more electric motors, increases an axle torque request, and unlocks a torque converter. Specifically, the dielectric body is composed of a downmost dielectric layer, an intermediate dielectric layer and a topmost dielectric layer. Said device comprises a light source for the provision of illumination radiation, an illumination optical path for directing the illumination radiation onto the ocular fundus and observation optics for reproducing the illuminated ocular fundus, the observation optics comprising a module, whose refractive power can be electrically adjusted. One end of the attachment may be a connector means for fastening the attachment means to the floatable object and may also be attached to the rod.