A cane comprising a shaft, an ergonomic handle that includes multiple storageretention zones, an emergency assist handle, and an ergonomically enhanced tip, or foot. The channel impurity gradient in the transfer gate provides a complete charge transfer between the charge collection region of the photodiode and a floating diffusion node. The method and system may also include determining the depth of the region that is beneath the horizon and disregarding this region when the depth is less than a predetermined threshold. The height of the controller mount and the angle between the frame and the controller mount are independently adjustable. Also once released, the leg assemblies may move from the use mode to storage mode quickly and easily. The data recording method includes: dividing data to be recorded on a recording medium into blocks having a predetermined size; repeatedly recording each block at a predetermined number of times on the recording medium, and recording the predetermined block size and the predetermined number of block recordings on the recording medium.