The present invention relates to isolated polypeptides having antimicrobial activity and isolated polynucleotides encoding the polypeptides. The refueling drone may be rearwardly deployable from the tanker aircraft such that the refueling drone is towed by the refueling hose behind the tanker aircraft. This provides a process by which a coupled compressor and de-compressor system can effect the transmission or storage of video at low bitrates with high perceptual quality of the decompressed video.