A strap having increased column stiffness includes a leading edge and a trailing edge forming a length of the strap, a first outer edge and second outer edge defining a width of the strap, and a first side and a second side defining a thickness of the strap. Various parts of the navigation systems may be implemented in a smart-phone. If at least one device is discovered in a Personal Area Network managed by the relay device, the relay device determines a relay mode with the at least one device, and provides a DM service from the DM server to the at least one device according to the determined relay mode. A controller provides electrical signals to the first and second electrodes to energize and measure the baseline capacitance and repeatedly energize and measure the present capacitance of each capacitor. wherein R1\u02dcR6 are as defined in the specification. Bias members may be coupled to the elongated member.