Disclosed herein is a target display device for assisting to aim at a target beyond a vision obstructing object, the device comprising: a forward-facing camera; a target marker projector; and an orientation marker projector, wherein: the forward-facing camera is adapted to capture an image beyond the vision obstructing object; the target marker projector is adapted to project a target marker; the orientation marker projector is adapted to project an orientation marker; and the forward-facing camera is adapted to capture an image in alignment with the target marker and the orientation marker along a longitudinal axial plane through the target display device.