What Year Did Placing The Name Of The Ship/Unit On The Right Sleeve Of the Navy Dress Jumper Become Official?

January of 1941 saw the passing of another old tradition with the abolishment of the hat band ribbon which bore the unit's name on the flat hat. Security appears to be the factor for its demise and it was eventually replaced by the shoulder unit identification mark. This practice continued until July 1973, when it was discontinued as damaging to the suit material and construction.

The above is from "The History of the Enlisted Naval Uniform"

We switched from the CPO/Officer style dress blues back to "cracker-jacks" in about 1980/1981 but did not have the unit ID's for the right arm at the time. I got off sea duty for the first time in 1984 and if I remember right the sea duty units were just getting them but not the shore duty units. By the time the shore duty units got them I'd made Chief and didn't need it.

Signed last year, official this year.