Hi all,

I have a question for our Canadian friends - I have noticed in ORBs of Canadian bomber squadrons in the UK that sometimes the crew has been returned from an operational squadron back to the OTU and after the course it was posted to the squadron again.
So far I was able to find out that it was in case of crew member change, but I have few additional questions:

1. was it general rule that any crew with personnel change has to pass the OTU course once more?
2. this would happen in case of any change or just in case of key person like pilot/navigator?

Any additional information about this procedure would be much appreciated.