Described herein are implementations of various technologies for a method for mapping water table depths. The clamp may include at least one inward deformation that provides an interference fit between the clamp and the pipe or tube. The archways are used to run or connect various transport elements, such as electrical wiring, water lines, and environmental control system conduits, between the upper crown, lower bay and passenger cabin of the aircraft. The ribs deform as the tab is inserted through the opening to achieve an interference fit. The oval-shaped cavity houses a domed protuberant. A second decoder, coupled to an output of the first decoder, combines with the first decoder to provide iterative decoding to recover data stored on the disk when in an iterative mode of operation.