"I have done some diving in Mauritius when I was there on a holiday and learnt some basic stuff while shooting for an underwater ad with the equipment used for diving but Zoya wants some hardcore scenes underwater for which I have to be properly trained." The under-sea portions will be shot in Spain." Katrina added.  
Katrina doesn't plan to be a certified deep-sea diver she plans to learn it seriously. "I have told Zoya to let me do the scenes in shallow waters as I am bit nervous about shooting underwater. The deep sea is very mysterious and I feel bit scared at finding out what's there." Katrina said.