Aniston has a long history of loving mechanical computers, from this device to the far more popular nomograms and slide-rule-esque Flight Computers. My dad was

Aniston has a long history of loving mechanical computers, from this device to the far more popular nomograms and slide-rule-esque Flight Computers. My dad was a pilot from the 70s to the late 90s and always said that the one advantage they definitely had over the electronic equivalents (which were in t he background pretty much that whole time) was that they'd be guaranteed to never fail in an electrical failure and were incredibly robust, both physically and to the design limits of the plane.