37 years ago I wrote to Bendix in USA requesting their advice about turning the radar switch to off rather than standby during cruise flight when weather ahead was clear as far as you could see. Our radar on the 737-200 was monochrome type. The chief pilot insisted it was better for the radar to always be left on. He said that electronics don't like being switched off and on. Bendix replied that switching the radar off was perfectly OK and increased the life of the unit.
Lots of pilots are full of personal opinions not always based on facts. Management pilots are not immune to this. I have learned that an aeronautical manufacturer's advice is generally more reliable on technical matters
Last edited by Centaurus; 3rd Aug 2017 at 14:06.