For the Varthamans, flying the MiG-21 fighter aircraft is a sort of family tradition. His father Air Marshal Simhakutty Varthaman also flew the MiG-21s and was an IAF test pilot, who retired five years ago, a family friend said here Friday. In an interview to PTI, Wing Commander Prakash Navale, who was a course-mate of Abhinandan’s father at the National …