What is "aatank"

'Aatank ' is a 1996 Bollywood film starring Dharmendra, Vinod Mehra, Hema Malini, Amjad Khan, Ravi Kissen and Nafisa Ali. It is inspired by the Hollywood film Jaws as it has a sub-plot with a killer shark. The film began production in the mid 80s and was delayed for several years and released in 1996. By the time of its release, two of its cast members Vinod Mehra and Amjad Khan had died. Most of the movie feature a younger Dharmendra and Hema Malini but one scene features a much older Dharmendra and Hema Malini resulting in a continuity error. As Amjad Khan expired in 1992, the dubbing for his voice has been done by a mimic artist.