Embodiments of the present invention include improved communication system and methods. The sequential data extractor extracts a region of measured data obtained from a measuring device. Thus, a structure suspended from the float and which is part of a line towed by a ship remains at a constant depth. , a subscriber’s wireless identification number, to the service provider. Thus, the electrical coupling between any two of the phase power converter is removed. Another method performed by an appliance includes in any order: determining a figure of merit of communication between tags and readers; sending information for a reader to adjust communication with the tags in accordance with the information.