Ghost on a ship...

There was an accident the previous day on board a ship. After that a colleague told me that they had sent photos of the ship over, and there was something weird about those photos. Every photo seemed to have indications of some apparition hidden in some part of the photo. Someone made a comment that every one of those photos could be explained with engineering judgement, like flickering lights, shadows being misinterpreted, a cloth looking like something else... but imagine every photo turning out like that. And these were taken by the security camera that was on board the ship that night. Spooky...