ETOPS Question
Ok, was having a discussion about ETOPS with a friend today. If say your airline was certified ETOPS 180 and a particular route could be achieved using ETOPS 138, would you dispatch at 138 or have more flexibility with ETPs' by dispatching at 180? I understand British Airways dispatch all of their ETOPS flights at 180 regardless.... what are the benefits of dispatching using a lesser time rule (if the route allows) apart from a potential saving on crit fuel?