when scuba diving in Oz and seeing a fairly large shark about 20 feet below me and I was a fair bit away from the boat, I did not tell exmrs LT i just steered her back to the boat and hoped we would not die and lucky we did not.
The main Oz instructor told me that as it was duuing the day he did not think it would have attacked but funny then he cancelled the dive and spend the whole time on the radio swearing quietly on the way back to shore