Methods and apparatus, including computer program products, implementing and using techniques for managing data items in an inventory management system. The RCDB bomb casing may be formed from conventional or penetrating warhead bomb casings. Each sub-band may be processed separately to reduce a peak-to-average power ratio of a transmitted optical signal. The model is then exercised with an input parameter, which, for example, may represent a different perspective than the original set of images. The nozzle plenum is moved vertically up and down between various operating positions as the tubes telescope into and out of one another to accommodate the changing longitudinal configuration of a vehicle and the nozzle plenum may be rotated about the axle to efficiently direct air against the contour of the vehicle.