a docking system for securing a wheelchair into a vehicle in which a docking shoe is firmly attached to either the frame of the wheelchair or to the floor of the vehicle , or both . a firm anchor device , which may be a second docking shoe , is firmly attached to the other of the floor and wheelchair . a docking arm is mounted vertically in the anchor device and the wheelchair is positioned in the vehicle so that the docking shoe and the anchor device are vertically aligned one above the other so that the docking arm can be slidably and releasably locked into the docking shoe . preferably , the docking shoe includes an electrically operated , spring loaded , release mechanism , and may also include a slide mechanism to allow limited forward and rearward movement of the wheelchair while under restraint .