EMC, Electromagnetic Compatibility, is the term used to describe how well a device is able to function as intended in an electromagnetic environment. Furthermore, the device shall not cause disturbances that might interfere with the operation of other electrical products in the environment. Electronic devices that can function and meet the criteria are called electro-magnetically compatible devices. When it comes to winches the EMC critical part is the control system. To protect the control devices from electromagnetic interference we use shielding structures with filters that surround the electronics. All our winches for military use are available in versions that comply with the EMC requirements according to MIL-STD-461F. These products have much higher demands on immunity to electromagnetic disturbances and at the same time have lower permitted emission of electromagnetic disturbances. When you manufacture products with military EMC requirements, you need more expensive parts like shielded electronics, cables, filters and specially designed circuit boards. It also demands longer assembly time and design time, low volume purchases and more extensive testing. That is why EMC certified winches are more expensive than ordinary ones.