Acvtually, that was what I was talking about, although I was trying to be brief. Commodores and admirals (flag officers I mentioned earlier) wore the same dress uniforms as captains, but with the addition of more gold piping along their sleeves.
It looks like in WNMHGB the badge insignia showed rank and rate and not department. "Command" was only worn by Captain and XO, "Science" by senior officers, "Services" by junior officers and crew. Captain two gold stripes, officers one gold stripe and crewmen no gold stripes