Robert Comsol wrote:
Either Bridge officers "do their business" prior to their work shift (with the help of 23rd Century medicine?) or can ask one of the other Bridge crew members (from secondary monitor stations) to take over for a few minutes, IMHO.
That would be a great scene!
Chekov: Permission to leave the bridge, Captain?
Kirk: What for?
Chekov: I have to take a dump, Sir.
There was a scene in Diane Carey's novel Dreadnaught
where this actually happens. The main character asks Spock for permission to step below deck (or was it above deck?) for a moment.