These ghosts are embodied by objects rather than people. They can take the form of ships, cars, trains, or even lamps. These ghosts create residual hauntings, which means there is no interaction between you and the ghost.
What you are seeing is only a playback of events that have already occurred. The event is imprinted in the area because of its significance. You are not in any danger, because you are not actually witnessing a ghost, you are only witnessing leftover energy.