The invention relates to an arrangement at the discharge end of a debarking machine for the preliminary debarking of logs prior to a separately performed final barking and for the expulsion of at least some of the removed barks from a wood flow passing through the debarking machine. In that method, a masking layer is formed on a substrate. The coil support member is made of resin hardened soft magnetic material. The techniques comprise receiving an instant message communication at the instant message module. The nature-effect strands may have different camouflage patterns so that an enclosure can have an appropriate camouflage scheme no matter what season or environment. According to the invention, said operating device may be provided with additional functionality with a construction of the minimum technical complexity, wherein the transmitter arrangement may be rotated in relation to the receiver arrangement and is designed such that, at differing rotational angles, signals corresponding to the given rotational angle may be generated in the receiver device.