Can anyone confirm that the US Destroyers did have directors for their 40mm guns, whereas the RN didn't?
My understanding is that any RN DD with a twin bofors Mk V or USN LL supplied equivalent, had an associated MK51 director, as did USN destroyers. Theoretically, power worked Bofors/pom-pom singles or quad pom-poms would have an on-mount Mk14 or equivalent gyro gunsight.