Neesy
#1 fan (Annie Wilkes cousin) 1st cousin Mom's side
Salute at attention, standing straight up, heels together, feet at 45-degree angle, left hand curled closed with thumb along trouser seam, saluting arm to the side, straight line from elbow to fingertip, with fingertips lightly touching edge of cover (term for hat, cap, whatever is on your head). Salute first to higher ranking, they return the salute, then you drop the salute.
Army's different, I think, but in the Marines we did not maintain cover when indoors unless armed. No cover, no salute. So no saluting inside.
And I know that this degree of detail makes the average person go, "Lighten up. What's the big deal?" Well, if you're in, it's a big deal, and if you're portraying people who are in, then your portrayal should be accurate.
I think maybe the British salute is different from the American salute?
The Canadian military one sounds like what you described actually.