An outrigger for connecting to an external bone fixation clamp comprises an elongated member having a length, a proximal end and a distal end, the distal end having a threaded portion. The ceiling is fixed between the outer housing and the inner housing by locking the first locking facing portion of the inner housing in the first locking portion of the outer housing via the lamp opening portion in the ceiling. New SSPs and intermediate products are formed by such methods. The blanker includes a switch that opens whenever a band-pass filtered input signal is greater than the average level of the signal by a predetermined proportional amount. A typical method comprises the steps of receiving position and velocity information data from a global positioning system receiver unit, receiving vehicle dynamics information data from one or more vehicle dynamics sensors and determining a vehicle attitude from the position and velocity information and the vehicle dynamics information data using a Kalman filter. The resources of a modular repository that are mounted under the common directory may be accessed through the common directory.