I think he challenged a few 'political' admirals, and proved them wrong.
The Code Breaking efforts success yardstick is that it shortened the war by approximately 2 years.
2 years is a lot in manpower, lives and other things military - yet received little recognition (even secret recognition)... a disgusting military shame.
I busy watching DSTVs WW1 veterans and the stupidity of military, highlighted be the one soldier shot for desertion. He spent 3 years on the front and finally cracked and ran 'anywhere'. His court martial evidence was that 'Many times I didn't know what I was doing or where I was - I felt I was was a danger to myself and others and had to leave'.. they put him front of a firing squad, after 3 years on the front