We see people on a boat and then see quick shots of people on a boat in diving gear.  We see people under water diving.  A man holds a white thing and touches it over and over.  Above water people are on the boat and a person falls into the water, we see people underwater diving and looking at sealife at night.  A person falls back into the water and we are underwater near a shipwreck in the day.  The men get on the boat after they are done.