When Gina first makes an appearance asking for medical supplies she has bruise marks on the back of her left arm. Later that night after getting rescued Mei approaches Gina to treat her Injury on the right side of her back. Large bruise marks can be clearly seen. The following day Gina is on the beach in a bikini and none of the bruise marks can be seen anywhere.
Early in the film, Bishop gives his father's watch to Gina as a remembrance of him and his promise to return and rescue her. Throughout most of the film after that, he does not have the watch on his wrist until there are underwater scenes and shots of him trying to sneak on board Crane's boat near the end. The watch is plainly visible since his forearm is in the foreground.