Way back in the day when I was a lad. It was stand. The only chair, was the Pilot chair, usually in the fwd port corner of the wheel house. Best not to get caught sitting in it by the old man.
There was usually a “day bed” or couch at the side back by the chart table.
I only ever saw one silly old codger use it. He went and tried to sleep on it in Fog one night.
I preferred to stand. Or actually walk around. Most of the time.
We had two radars, one forward, one aft beside the chart table.
Both with plotting screens and hoods.
So you walked around. Looked in the hood, out on to the bridge wing to look around including astern.
I would sit in the Pilot char occasionally, late at night out at sea. Always had a look out on duty at night.
One of the other 3rd Mates, had a collision, in the North Sea with a FV.
Glancing blow no serious damage.
He was sitting in the pilot chair, the FV was in his blind sector behind his shoulder.
He was apparently awake keeping a look out, just not a very good one.
In later years on other ships. I had a stool. Which I quite liked, you didn’t get to comfortable.
As Master, running coastal, we do our own pilotage and landings. I quite like to sit in my chair with my feet up drinking coffee and leave the Mates to it. Basic rule everything was cool, so long as I didn’t have to get up out of my chair.
Some of the smaller vessels, with 360 wheel house, I sit behind a consol. I like a chair I can get rid of so I can stand. I don’t like sitting all day.
Now the ships, have two chairs at conning stations in a horseshoe with every thing in front or beside you. Feels like a starship on Star Trek. I’m more like Picard than Kirk though.
Sometimes I have to stand up and walk around, if I didn’t I might nod off.
I’ve never nodded of standing up.