It's something that isn't made completely clear in Star Trek, how exactly are senior officers determined? It doesn't appear to be based on rank, since we've seen many officers onboard who outrank the likes of Sulu, Chekov, La Forge, Worf, Paris and Kim at one time or another.
Asides from the Captain and XO, in the TOS era we have the following position personnel as senior officers...
Science Officer - Cmdr
Chief Engineer - Lt. Cmdr
Chief Medical Officer - Lt. Cmdr
Helmsman - Lt
Communications Officer- Lt
Navigator - Ensign
Now in the TNG era we have the following position personnel as senior officers...
Chief Medical Officer - Cmdr
Counsellor - Lt. Cmdr/Cmdr
Chief Engineer - Lt/Lt. Cmdr
Operations Officer - Lt. Cmdr
Security Chief/Tactical Officer - Lt/Lt. Cmdr
Now obviously we can rule out rank being the sole reason for selecting a senior officer. In the TNG era, the helmsman role isn't presided over by a senior officer. The same went for the Navigator role in the TOS era until Chekov came aboard.
Could the most qualified person out of the personnel who work particular stations on the bridge be the ones who are given the senior officer role? This would provide a reason for Harry Kim being given the role of senior officer, despite being an Ensign and just out of the Academy. It's resonable to assume that he's the most qualified person who works the OPs station.
Thoughts?
Asides from the Captain and XO, in the TOS era we have the following position personnel as senior officers...
Science Officer - Cmdr
Chief Engineer - Lt. Cmdr
Chief Medical Officer - Lt. Cmdr
Helmsman - Lt
Communications Officer- Lt
Navigator - Ensign
Now in the TNG era we have the following position personnel as senior officers...
Chief Medical Officer - Cmdr
Counsellor - Lt. Cmdr/Cmdr
Chief Engineer - Lt/Lt. Cmdr
Operations Officer - Lt. Cmdr
Security Chief/Tactical Officer - Lt/Lt. Cmdr
Now obviously we can rule out rank being the sole reason for selecting a senior officer. In the TNG era, the helmsman role isn't presided over by a senior officer. The same went for the Navigator role in the TOS era until Chekov came aboard.
Could the most qualified person out of the personnel who work particular stations on the bridge be the ones who are given the senior officer role? This would provide a reason for Harry Kim being given the role of senior officer, despite being an Ensign and just out of the Academy. It's resonable to assume that he's the most qualified person who works the OPs station.
Thoughts?