According to an aspect, a method of performing environmentally-aware landing zone classification for an aircraft includes receiving environmental sensor data indicative of environmental conditions external to the aircraft. According to one aspect, the system includes a portable device, a base device, a user device and an electronic receipts administration system. The compressed storage data is mutually compared by a comparator, and abnormality of processing can be detected when the comparison result indicates a mismatch. The connection member is formed of a first connector and a second connector. The method further moves the cylinder and a hanging ring down to connect the hanging ring and the weight, moves the cylinder along with the beam and the plurality of movable pulleys, to locate the weight on the top of an electronic scale, and moves the cylinder and the hanging ring down to place the weight on the electronic scale. The first piece includes a plurality of cable management spools disposed on the base wall.