A steerable system comprises a fluid powered motor 10 having a rotor 16 and a stator 18, and a bias arrangement having a plurality of bias pads 34 connected to the stator 18 so as to be rotatable therewith, the bias pads 34 being moveable to allow the application of a side load to the steerable system. A model is provided of a multiplicity of compartments within the structure, and the presence of a fire within a compartment is determined. The coil assembly and the capacitor are embedded in a structure which provides physical support for the coil assembly and the capacitor and access to a region near the coil assembly. Each coupler couples one of the plurality of pegs to the plate in a normal, extended state in which at least a portion of the peg is extended above the upwardly facing surface of the plate. In one aspect, the tree stand employs a rotatable sleeve in one arm for adjusting the length of the cable by adjusting the tension in the cable.